Actually Glue works very well with an RV parked on TOP of the thing.
In fact. I made some "Stair Steps" a few years back I'm no longer using them because of where they are stored I have other plaking that is easier to use but when I made them I stacked them, Drilled down through 'em for wooden dowling (Small dowwls just enough to keep 'em from sliding around till the glue died)
Jacked up my car. Slathered the shorter step with glue and slipped it over the
Pins (Dowels) on the longer slab then slathere the still shorter one and slapped it on and set my car on top of it.. Next AM I backed the car off (Did two at a time) and did the next set.
THey held up very well.. Very well indeed.
Common Wood Glue, nothing special