It's a trailer. I'm not sure that helps. I can drive screws into studs without a drill or applying an extra pressure to the screwdriver.
My gut says loop. That's what my gut also said when I built a pedalboard when I played in bands in high school. I'm sure I still have around 15 or so yards of Velcloth left somewhere, but I'm tired of looking for it. (Side note: I didn't want to be stuck to a single configuration on my board. I had around 20 pedals, and was constantly buying, selling, and trading them. So I shopped around for Velcloth and ended up buying it from the manufacturer. Minimum order was 20 yards, which was about 20 times what I needed. But hey, I got it for $11 shipped.)
then in that case take a butter knife cut a hole in the wall - stuff router in said hole. remove dead mice, place cut out piece back hold in place with elmers glue.
duct tape?