[JRTJH]

Air up the tires to maximum pressure indicated on the sidewalls, back the trailer into the space with the tires resting on a barrier. Either plywood, 2x8's or rubber so the tires are "insulated from moisture" and unhitch. Most people would recommend not to extend the jacks or stabilizers (if they are crank down type). If you have the automatic leveling system, then it's up to you. Remember that if you remove your batteries from the trailer for storage (recommended) you will not be able to move your trailer in the event of an emergency unless you reconnect the batteries. That's the reason I recommend not extending the automatic leveling system and removing the batteries.

Other than that, it's just a simple winterization and protection from mice and chipmunks.