Andrea,
     You might think about some of the sites on the islands in
Scotland. Scara Brae is a Neolithic site on Orkney, run by Historic
Scotland and complete with tour guides. There are also standing stones
on Orkney, as well as Maes Howe. All are maintained by Historic
Scotland. The Shetland Islands have lots of Iron Age sites, e.g.
Jarlshoff (located behind what is now a hotel), and various brochs.
Mousa broch is the most extant one and is on Mousa Island (oddly
enough). The island is inhabited mostly by sheep and seals and the
broch is unmanned and opened to anyone who can get a boat from the
mainland (which is easy). There are other sites of Neolithic to Iron
Age date throughout Scotland, including more standing stones on the
Western Isles.
     I don't have specific references but you could contact Historic
Scotland or the National Museum of Scotland.
     Tourism at these remote archaeological sites would be an
interesting study.Hope this gives you something to think about.
Nancy Russell