First is to forget the letter. You need to go for a face to face meeting with them. Introduce yourself and then explain the reason for the visit. After you start talking with them, let them know if its just you, maybe your kids who will be hunting. Respect is the key. If you get permisson, ask them what they may like for a show of appreciation. Mine love deer and turkey but they hate to hunt. So that plus maybe a case of cold ones and absolutely NO damage to their property. If you don't get permission, Thank them for their time and ask them if there is a chance that they may change their mind to give you a call. And if you're ever out driving around the area and see them out, stop again and ask. Could always catch someone on a bad day the 1st time.