I had lease insurance in Mississippi. We had to incorporate as a hunting club and got insurance thru the NRA.
My muzzleloader club is incorporated in TN and the landowners who own the land where we shoot are covered thru our insurance.
Hershel House, an icon in the traditional muzzleloader building world, passed away today. RIP.
Some info on Mr House:
http://www.housebrothersproject.com/articles/article4.html