Any letter of a memo-type that you can type up in Microsoft Word should suffice. It should include some of the following information.
Landowner
ex: Mr./Mrs. John/Jane Doe
Authorized users (you, and whether guests are authorized and how many)
ex: Mr./Mrs. Your Name
Guests are authorized up to 03 guests at any given time.
Location of the land
ex: 475 Farmer's County Road
or latitude/longitude coordinates of four corners of property
Size of the land
ex: 240 acres
Effective dates for your authorized use (start and end date)
ex: Beginning: 17 November 2009 Ending: 16 November 2010
Text stating authorization for user/s listed above.
ex: I, (landowner), hereby give (your name) unrestricted access and permission to use my land stated above for sporting purposes to include hunting, fishing, trapping, etc. in accordance with the game regulations of this state.
Landowners release from liability.
ex: By signing below, (your name), and any/all of guests thereof, are claiming full responsibility for damages to my property caused by their use. Furthermore, by signing below, (your name) releases (landowner) of any responsibility for personal injury, personal property damage, death, or fines/fees resulting from illegal activity from any endeavor pursued on my property.
Landowner signature:
ex: I understand and agree to the guidelines listed above. X__________ Date:______
User signature:
ex: I understand and agree to the conditions of this land usage permit. X________ Date:_______
Print two copies and have them signed in front of a Notary Public and have the Notary sign and seal the documents.
Make copies and keep copies in your truck and in your wallet with your hunting license. keep the original at home with all your other important papers.
That should be about all you need.