Correct me if I'm wrong But are you not driving up with your truck ?
My recommendation for that scenario is ditch coolers bring up a 6" chest freezer. with either a small generator and locking cable to secure it in the back of your truck. or an extension cord to plug it in if your staying overnight in motels.
This will fit a mostly boned out moose and a Cape with no issues.
Hopefully guide is good at capeing Might even be capable of turning the lips and ears.
For the rack and skull plate or euro mount just make sure all meat brain and optical matter plus cranial membrane is removed and wrap in plastic.
A decent cordless reciprocating saw works great for this far safer and precise compared to a chain saw.
Safe travels.