I have two seasonal campsites (the big house and the guest quarters). We winterize the big house and continue to camp in the guest quarters (with no campground utilities) during the off season. We run a generator and bring bottled water in unless they are calling for a mild winter (we run off of the fresh water tank if that's the case).
During the season, we leave the awnings out but we lower them and even bungee the one on the big house. We leave the slides out on the big house during the season (April 1 - November 1) but close the slides and cover it during the off season. The guest quarters doesn't have a slide.
We have had the big house set up this way since 2007 and we are in our second season with the guest quarters.