We made it fine. Had lows at 18 and 20's for 3 nights. Highs were upper 20's for 2 days. Kept electric heaters blowing toward kitchen and bathroom drain pipes and one heater in cargo hole near the incoming water hookup and hot water heater is located.
Put some RV antifreeze down drains at night. Filled up the fresh water tank and ran off pump because campground shut water off with exception of only a few faucets to refill. Ran furnance very little, heaters kept inside of camper in mid 60's.
Branson was beautiful. Took in a couple of shows also. Headed to Nashville now.
Thanks for all the advice.