We store our RV inside when not in use. Check with state and county fairgrounds - many rent out their buildings for storage during the winter months.
Minnesota State Fair takes RVs, Boats, and Cars in at the end of OCT and everyone moves out at the end of March. Very reasonable, maybe
$200-$300 for the season for a typical RV. Totally inside, dry, clean.
We have found a mini-storage facility that we can access year-round. The facility has the typical 10x20 lockers but also has a huge barn like building that we use now. Cost is about $750 annually for a 27' MH.
Inside storage is hard to find. We were lucky!
