Hi Sue, we are new to camping in general, but took the plunge to buy our vehicle and have loved it so far.
Our second trip, this past Xmas vacation was a 'baptism by ice' since we went to Maryland and had temps of 12-18 degrees! The only thing that froze were the dump valves, but some persistent application of 'hot water bottles' to the area eventually allowed them to open.
If your vehicle has all of the plumbing lines inside, and you can keep the vehicle interior well above freezing, you might be fine. We managed to get thru a bad spell where I neglected to winterize, and then couldn't until the weather got better. Everything was fine.