Are you going to Rochester MN
lists several year round RV campsites
We won't use the water system in the RV in winter We keep five gallon jugs of water in the truck in the heated compartment.. The bigger the container the longer it takes to freeze.. We have hot tented in the winter and with the tent warm with a wood stove frozen water is not an issue
Same would go for the water in your rig .. remember not to use the sink toilet etc.
Plenty of people use RVs to boondock and snowmobile in the winter.
2012 Honda Ridgeline
2016 195 RB.. 10,500 miles under tires as of today.
Been down many a dirt road in the west. We go where not too many rv'ers go.