I’ve been to the end of trail at the Maze Overlook many years ago in our FJ-55. It was no problem as we were narrow and had traction devices. There are several very narrow spots, and a few solid sandstone walls to climb, where you need clearance and narrowness.
AFA doing it in a truck camper, I know one person who has done it (the Grand Whazoo) and he had lockers both ends and a 6 inch lift on his Chevy pickup with pop up camper. His travelog is on the TC forum in RV.net.
As hard core as i think i am, I would not attempt it.
Next spring, my bro and I will be doing Elephant Hill and environs in our off-road equipped truck campers. It has been done, as the many You tube vids have shown, but with drivers who have the skills and experience plus those well equipped TC’s.
2020 Ford F-350 XLT FX4 4WD SRW SB SC 7.3L Godzilla Gas TorqShift 10R140 397 amps dual Alt dual batts Frnt Dana 60; Rr Dana M275 E-locker 4.30's 4580/4320/4066# payload 7243# curb wt. 11,300# GVWR 5-er prepped. 2020 Northstar Laredo SC, 12v compressor fridge, cassette, 320w Solar sub zero insulation.