Thanks Andrew...I called over there are they seem to be willing to work with me. They will call me back with a quote that would include early access (before open to the public) as well as permission to use a tripod. Not sure how large the group will have to be to make a visit like this practical in terms of cost, but I should find out soon.they are very nice group of people that run the museum. I would recommend calling them and seeing about drinking something up, maybe even a photographer’s only time or day and perhaps a group can get together and go.
I’ve sheets just relied on OIS or IBIS, so never fully inquired about special tour parameters myself.