From a structural standpoint, you should be fine. However, the slides are only sealed when fully extended or fully closed. Leaving them open partially could subject you to leaks.
2021 Transcend Xplor 247BH
Husky WDH with Sway Control
2013 Chevy Silverado 2500HD LTZ 6.6L V8 Duramax
Forever in my memory. Forever in my heart.
Laurie J. Wood 3/22/67 - 8/23/19