Complete newbie mistake (very first one to make)
On our very first voyage with a "new to us" pop-up several years ago ... completely forgot to remove crank handle after packing and lowering camper. Arrived at campground and totally couldn't believe I did it. No one around had one that would work. Eventually went to TSC store and searched for something. Ended up finding a large socket that would work until I returned home to order another.