81 to 66 to 17 to 95 Is the combo that has worked best for me.
81 to 17 to 66 to 17 looks shorter however many lights, Huge mountian to pull come off and get stoped for a turn onto a 45 mph road for several miles (full of deer). There are a few other options but the first combo is the best option I have found with the combo of time, distance, difficulty.
I was going to run 81 to 77 but my father (truckdriver) told me 95 is the flattest road to Florida. When we travel it we don't stop at any campgrounds, so I can't help out there. We just pull over and catch a few hours at a Walmart or Rest stop.
As far as water freezing I'm not familiar with a Class C (I googled your model nice coach btw). Is it possible that your tanks are heated? They are on my Class A so as long as the heat is running I am good. I have a friend that uses his coach all winter after winterizing but flushes the commode with windshield washer fluid. I can't verify this is acceptable but may be worth checking out. That way you would only need to shower at a campground. Just a thought.
My two cents for what it's worth. Good Luck and keep all of us stuck up here in the frozen north, up to date on your trip.
The Collins Family
Travis, Kim, Richard, Rebecca
2 Yorkies(Sophie and Annie)