I have extensive experience with both cargo vans and mini vans moving collections objects, having owned and used quite a number of each.  Right now, I have one of each.  The choice depends on a number of factors.  I'm not sure if this will be your personal vehicle used for other purposes as well, or will be used only for museum business.
 
Some of the factors in the decision are number of objects hauled at one time; distance moving objects; size/weight of objects; the need to tow a trailer; and whether you are purchasing new or used.
 
I have used mini vans to haul furniture, including chests of drawers, wardrobes, chairs, high poster beds, etc.  They can haul less than a cargo van.  But they are safer, easier to drive, less expensive to maintain, and probably cost less, at least used.  They have a rear door that is over 48" wide and can generally accommodate objects up to 44" or so in height.  There is actually a bit more height inside, but the door is the limitation.  Certain models also have 8' of length with the rear door closed (and seats removed), so plywood and other 4x8 sheet goods can be hauled.  I have pulled a 6x12 trailer in excess of 2,000 miles quite successfully with a mini van, so the capacity can be expanded.  However, the maximum trailer weight will be 5,000 lbs. or less.  If maximum cargo volume and ceiling height is desired, DO NOT get rear heat/air.
 
I purchased my current mini van a bit over a year ago, and did a considerable amount of research on cargo capacity.  I definitely wanted a van that could accommodate a 4x8 sheet of plywood, and also wanted to purchase used for under $10,000.  The vehicles that met my criteria were the GM product, all long body - Chevy Venture, Olds Silhouette, Plymouth Montana, etc. which are essentially the same vehicle.  I have gotten up to 30 mpg on the highway, and more generally get 25-28 mpg.  The Ford Freestyle and Chrysler/Dodge products did not meet my needs, primarily due to the plywood requirement.
 
A full size van (regular body, not extended) has about 6" more door width, 6" more height, and 2' more cargo length than a mini van.  It definitely can hold a lot more, at least 1 1/2 times in volume, and up to 3 times more in weight.  It can tow a trailer up to 10,000+ lbs. properly equipped.  I have a Ford E350 1-ton with a diesel engine.  Empty on the highway, I can get up to 20 mpg.  Gas engines with reasonable torque (V-8 or larger) generally will get up to 15-17 mpg empty on the highway (more like 15 mpg for the V-10).  It you get a really high gear ratio rear end (lower number), you may improve this a small amount, but will give up the ability to tow heavier weights.  You can get an extended body, which adds about 2' in length, but is on the same chassis, so the rear hangs over quite a bit.  If you will tow, you DO NOT want an extended body, as this creates more leverage for sway, making pulling a trailer very uncomfortable.  Cargo vans can be a pain to drive, and in emergency situations are prone to roll-over.  But their capacity and ability to pull a large trailer can't be beat(en).  If you go the cargo van route, I would suggest a 3/4 or 1 ton, so you have additional weight and towing capacity over the 1/2 ton.  You may also want to consider the diesel (more expensive) if you drive many miles a year or tow a trailer a lot.  If you will be using the van for a few thousand miles a year, the additional cost may not be worth it.
 
I generally prefer the Ford full size van products over the GM products (I've owned both), but they are probably generally equivalent.  An interesting alternative is the Mercedes/Chrysler van with higher ceiling height and generally a bit larger vehicle.  It has available a 5-cyl diesel I beleive, so would be good for general use with reasonable economy, but I'm not sure what effect it would have on trailering - probably reduces the maximum weight.  Since it is a rather new model, prices used could be much higher than the other manufacturers.
 
Feel free to let me know if I can provide additional information.
 
Marc
American Conservation Consortium, Ltd.
     4 Rockville Road
     Broad Brook, CT 06016
     www.conservator.com
     860-386-6058
 
*Collections Preservation Consultation
*Conservation Assessments & Surveys
*Low-Tech Environmental Control
*Moisture Management Solutions
*Collections in Historic Structures
*Conservation Treatment of:
     Furniture
     Painted Wood
     Horse-Drawn Vehicles
     Architectural Interiors
 
Marc A. Williams, President
     MS in Art Conservation, Winterthur Museum Program
     Former Chief Wooden Object Conservator, Smithsonian Institution
     Fellow, American Institute for Conservation (AIC)
 
 
----- Original Message -----
From: [log in to unmask] href="mailto:[log in to unmask]">Bryan McDade
To: [log in to unmask] href="mailto:[log in to unmask]">[log in to unmask]
Sent: Wednesday, April 11, 2007 3:37 PM
Subject: [MUSEUM-L] Cargo Van versus mini-van

Dear Colleagues,

 

I work at a historic house site, and I will need to replace my existing cargo van soon.  Due to budget considerations (price and potential gas mileage), I may have to replace the van with a mini-van.    The types of large artifacts that I will be transporting would include furniture (tables, chairs, beds, dressers, etc.), paintings, plus other smaller materials.  I have been given a very short deadline to research this topic, and so I would like to seek some input from the list.  I would prefer to lobby for a cargo van, but may have to settle for a mini-van.  Have any of you dealt with the pros and cons of using a minivan as an artifact transport vehicle.  Feel free to contact me off the list.

 

Sincerely,

 

Bryan D. McDade

Curator

Historic Washington State Park

PO Box 129

Washington, AR 71862

Phone: (870) 983-2684

Fax: (870) 983-2736

e-mail: [log in to unmask]

Visit online: http://www.historicwashingtonstatepark.com

 

This electronic message transmission contains information from the Arkansas Department of Parks and Tourism and is confidential or privileged.  The information is intended to be for the use of the individual or entity named above.  If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this information is prohibited.  If you have received this electronic transmission in error, please notify us by telephone (870-983-2684) immediately.

 

========================================================= Important Subscriber Information:

The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes).

If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).

========================================================= Important Subscriber Information:

The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes).

If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).