You will get a lot of opinions on covering or not. I personally like to cover mine for the winter. I wash and wax it, winterize the plumbing, and in the spring it will look nice and be ready to go. And I leave it plugged in all year. I check the water levels in the batteries in the spring, and in the fall when I winterize.
Vicki and Mike, Aria 3901- The Wined Up Bus