I use an ADCO cover.. Surrounded by trees and during the winter, they like to drop a lot of stuff on it!
I like covers, but others don't.. All you can do is go one way or the other and decide for yourself.
My ADCO only cost around $200. The 5th wheel ones run a bit more, and they take some time to put on and off, so "choose wisely"..
I covered my old 2003 Prowler for it's life under my trees and was able to trade it in for my now Rockwood for about 3 times more than I thought they would give me for it... (it actually cleaned up really good, and I was impressed with it in as I dropped it off!)
Anyway, good luck! Mitch
2013 F150 XLT 4x4 SuperCab Max Tow Egoboost 3.73 gears #7700 GVWR #1920 payload. 2019 Rockwood Mini Lite 2511S.