Do you have extra bunk space that no one is sleeping in? We use Rubbermaid storage boxes on a bunk. Have more stuff in them than in the cabinets and drawers. Do either of the rigs have a Polar Package that is designed for winter? On some trailers, the water and sewer pipes run under the rigs instead of in a basement compartment. You want the most protection you can get from freezing. Sounds like you are going to be mostly sitting in a camp rather than mostly driving down the road with your rig The motor home is better for driving down the road but the trailer is better for sitting. Also, many motor homes have a generator that might come in handy in power outages. Motor homes have the added engine maintenance costs. Finally, a consideration that is biting me in the backside: What kind of furnace do they have? Are you going to take propane tanks off every week in the winter to go have them filled? Are they 50 amp rigs with electric heaters? Remember, every park doesn't have 50 amp and every region won't let you have an external propane tank. Have fun.