Carry your fresh water in jugs, as mentioned. Can get the big water bottles from Wal-Mart or Safeway type stores.
When in the RV..using the furnace can get to be a power problem. I light one of the stove top burners...it's amazing how much heat is created.
As far as tanks...toss a gallon or two of RV anti-freeze into each of the tanks. There..that problem is solved. Have a jug of anti-freeze with you and each night toss a cup down the pee traps.
As for driving? Man..an RV on icy roads is just terrible. Mine is 4x4 and I engage as soon as the road is white and drive at a very careful speed. Once it slides..it won't stop until it runs out of pavement.
Gary Haupt