I carry an inexpensive 6-foot folding ladder, and store it up against the front wall of the basement. It only takes up about 6 inches of room, and is one of the most useful things I carry.
I was considering tightening up the slide awnings, but realised that would only allow more water to be held on the awning, and probably cause it to stretch in the middle. then it wouldn't roll up properly.
I think what I will do is figure out some way to strap it down, but not so crude as tying a rope around the whole slideout!