I rolled up my sunscreen inside my A&E with a Carefree automatic conversion without any trouble for over a year - I just sold my Wh22 and bought a DP. . I kept it dry and made sure it didn't fold over as it was rolling up. It was also 6" shorter than the main awning, giving a 3" margin on each end. Loved it.
2007 Triple E - Empress Elite - Freightliner
WH 22 owner for 7 years