Gary I have built two wooden cabinets for our Scamp
, a rear over the dinette cabinet. I used no thru fiberglass rivets or screws, supporting it off the window frames. If this is of interest let me know and I'll provide details. I believe there are some details under Modifications, Preparing a 1991 Scamp
I also built a over the couch wooden cabinet off the end of the side bathroom, cantilevering it off the bathroom wall. I strengthened the cantilevering wall with wood on the inside.
I also built a little shelf over the door, attaching it to the closet and door frame.
None of the wooden cabinets have any thru hole fasteners and have not moved in a Loop of the USA and trip to the Maritime provinces.
If you're interested in any of the details let me know.