if you have lead acid batteries you can either fully charge them then remove the negative cable, leave them on a trickle charger or remove them to a garage or shed. you should be fine for the winter.
if you have AGM batteries you shouldn't have to do anything except fully charge them before storage.
i'd winterize the plumbing either with pink RV/Marine antifreeze or by blowing out the lines with compressed air. see your owner's manual for specific directions.
be sure the tires are inflated.
i always stuffed the fridge and freezer with crumpled up newspapers to reduce/inhibit mildew. and leave the doors to the fridge and freezer cracked open.
remove anything that can freeze. food, aeresol cans, liquids, etc. from the kitchen and bathroom(s).
best advice...head south!
