do not dry the cushion covers they will shrink.. Wash on delicate with cold water and put back on while damp then let air dry.. I do this all the time at home for the cushion on my couch . If you let them dry first they wont fit back on (it always shrinks when it drys) the material will stretch when damp so that you can get them back on. Scrunch up the material inside out like you would a pillowccase , grab hold of the corners and fold the cushion in half lengthwise and pull the material over it so it turns right side out as you pull it over the cushion .. if you get the corners right you can just push around on the cushion to get the rest in place. If Its an older camper those curtains may fall apart if they were never washed before.. Take measurements of them before you wash just in case.