How much is insurance for a sleepover summer camp? Ballpark?

Hi, I'm working on rough draft budget for a sleepover style children's summer camp. Does anyone know a ballpark figure on how much insurance will cost. I'm not looking for a quote, just to see if this is a feasible project. The camp will focus on agriculture and children will be working with farm animals in a controlled setting, but still due to the nature of the camp I would need very good, high liability insurance. Also, do you forsee any problems even attaining insurance since there are animals involved? We're talking goats, sheep and real tame dairy cattle, not rodeo bulls! Thanks for all your help!