Floor I gather is above deck. Appears the bumper wings could be trimmed, not removing bumper, drain easily moved, allow sliding camper forward several inches, without modifying the dump line.
Definitely need a forward stop for mass of camper.
The boxes be nice if front flush with camper, require re-trimming skirts to slide back. Which I don't know how much room behind the skirts or structure in yours.
Kind of of shown in one of your pictures but a full length piece bolted to or replacing existing tiedown points would easily allow fronts to clear boxes. Could also extend rearward to clear boxes, access? maybe door in skirt or panel to end of box. Be good place for quick release.
Room to slid hand under skirt to area behind?
Front anchors need to pull camper forward with some side to side angle, rears side to side more critical.
Edit: last post mentions-type too slow
