Check the terms before you sell the tour. A museum can limit group sizes, require groups to book an entry time, restrict where an outside guide can talk, or only allow its own staff to guide. The Australian War Memorial's tours page asks groups of more than 10, and all external tour providers, to contact it to arrange a booking. At Fremantle Prison the Prison's own guides lead every tour, and at Port Arthur the agent handbook says guided tours are delivered by the site's guides. Build your tour around those terms, keep a copy, and brief your guides on them. If a guest is hurt while your group was somewhere it wasn't allowed to be, that fact will sit at the centre of any claim.
Crowds and children. A museum at school holiday peak is a different place from a weekday morning. Plan routes that avoid the busiest galleries at their busiest times, keep each child with a named adult, agree a meeting point before you go in, and count heads at every doorway you pass through. A school's excursion approval can ask for all of this in writing, so see educational tour insurance if you run school groups.
Behind the scenes. Collection stores, conservation labs and workshops are working spaces, with racking, trolleys, lifts and objects on open shelves. Agree the route and group size with museum staff, have one of them lead where possible, and tell the underwriter that behind-the-scenes access is part of your product. Adding it mid-year is a change in activity you need to tell the insurer about. Our guide to risk management for tour operators covers how to write the controls down.