I wondered about that when we owned the X23B. My conclusion was that it's probably be OK as long as everything soft was folded up between uses (bunks and awning). I'd never leave an awning out while away, tied down or not.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks