I had a Scamper Popup for many years. I would usually do this myself, it worked for me. The crank handle (inside) could turn loose so I beleive they are similar. I used a piece of PVC for mulitple uses about the length of a broom handle, it would rest between opposite shelves and keep the handle from spinning. I would lowwer it to about a 6" gap. From the inside pull the canvas in where I could, On the outside I kept a plastic rake and would tuck-in the bedding or over the cab canvas parts. The rake was one of my last items in, first item out and used it to clean up sites.
