In CT the DEP has eliminated much of the problem. People hunting on private land must carry a signed permission slip from the actual landowner/s. The slip also carries terms, basically that landowners are not liable unless there is a pre-existing dangerous condition which was undisclosed to the hunters (ie, an old well or mine shaft resulting in a hunter breaking a leg, etc.)

Some friends of mine in NY are writing similar letters to sign and give to those hunters who they let hunt their property. By hunting the property, the hunters relieve the landowner of all negligence & liability.

Go the route of having something in writing---but it really doesn't matter until you own the property. Then the fun will begin...you won't have to worry about the guys you give permission too, it will be the trespasser who falls out of one your trees that sues. Be sure to post your land, that takes care of the trespassing issue.

Good luck,

S&R