insurance for a traveling troupe??

I don't know if anyone will have had experience with this but....I need to get liability insurance for our comedy troupe but haven't been having much luck. Anyone know of a specific insurance agency that deals with entertainers in a traveling troupe? Also- any marketing tips that you've used? My main focus is performing, writing & directing- all the management stuff is so difficult. Any advise would be greatly appreciated. Thank you! Anita