I have been asked to write a policy for use of the Museum's grounds by
professional photographers.  We are a very popular spot for senior pictures
and have had some difficulties with clothes changing, blocking visitors etc.
I am concerned that if I encourage the photographers to used the grounds
after hours I am increasing our liability if an injury of some kind occurs.
At the same time I dont want to discourage responsible use of the grounds
since its good PR and forbidding the use would be bad PR and impossible to
enforce.

Does anyone have any policies in place or advice in dealing with this?

thanks

Dave Mitchell