Blankets, doonas and pillows stay on the main mattress when we fold up our soft floor CT. On the last packup (heading home), sheets and towels go in a cloth bag in the trailer hub, are removed when we get home, washed and repacked.
We put a Supercheap silver tarp over the top of everything on the mattress before we fold up so it doesn't matter if the canvas is wet. If it is wet, we set the CT up when we get home to allow it to fully dry.
KB