Regarding air, if you’re just filling tires, your pancake will do the job as you’ve found.
Note what pressure you need in the rear tires. It’s not 80psi or likely even close to it.
My 37s only need about 45psi with the camper and the fronts don’t change.
I bought a little Viair for filling my airbags as our 2016 doesn’t have onboard air like I had rigged off the exh brake on the old truck. It’s a small one and would get me out of the woods with a tire but not ideal, even the larger ones, for regular duty.
Honestly, just go get a good size air compressor for the shop. Once you have one you’ll realize how handy it is!