How do you screw stuff into the walls?

I used 1x2 strips of wood that I glued to the interior. In some cases, I reinforced the strips with screws into studs (if they were there) for heavier items. In one case, I glued and screwed a 1x2 that runs the vertical length from the bed to the celling on the corner of the bathroom and it holds a larger TV on a swivel mount. We remove the TV from the mount when in transit. I removed the TV and DVD player from beneath the little cabinet...got tired of bumping my head.  Will send pictures at some point, trailer is in storage.

it was gorilla glue, but no way to really clamp so I used braces across the trailer.

I don't want to drill any holes. In case I might want to sell the thing down the road. Try the velcro with sticky..get it at LOWES.

Don't believe I'll be screwing ANYTHING into my beautiful new walls. Not even art..and I'm an artist. I think the interior itself is a work of art. If anything, I'll use velcro (with sticky on one side). Just my humble opinion, but I like the minimalist look. (Sorry for the redundancy!)

Lots of good info given. Makes me feel better about mounting something light to the walls.

Thanks