Most lessors will have a contract that sets forth the terms. More than likely you can expect to be required to carry some form of liability insurance to protect you and the landowner.
If the landowner has never leased to hunters before you will need to ask for rules. Be sure to address things like what is allowed such as leaving a trailer overnite or the whole season, building permanent stands, driving nails in trees, clearing "shooting lanes" , access to any ponds or streams on the property, having campfires, allowing guests, liability release forms for him and you etc.....
