Max, as long as you have the heating system (furnace in your case) on the takns should have sufficient heat not to freeze. You could turn it on just prior to loading up and then fill the water tank and dewinterize the coach. Keep the furnace goind during your trip and enjoy having all the comforts of home.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7