I set up a permission document on the computer that just says that I'm the person that's hunting their land and ALL liability issues are on me. They will not be held Liable for any problems that may occur while I'm hunting . Really easy permission slip kind of thing and for the last 10 years have had NO problems with any land owner signing it. Heading out in about 3 weeks and plan on staying this year from Sept. 8th until Oct. 21. Should be a great year , have already heard lots of Cranes in the area I go.