UV fading and damage used to be a big concern to me as well. If I had a garage our camper would fit in, I'd do it in a minute! However, I found with my prior campers that tinting the windows with a high-quality window tint, keeping the curtains/blinds closed, and waxing the camper regularly kept it looking new. Black streaks would just wash right away even. I tend to wash the camper after every so many short trips and just got used to applying a spray on carnuba wax after washing (been using Eagle One Nanowax as it's cheap and works great). It literally is just spray on, wipe off. I can wax the entire camper myself in an hour. Doesn't require waiting for a haze and buffing at all.
