Pay attention to these Three things on the return route worth a second read
The Zion-Mt Carmel Tunnel
Vehicles wider than 7'10" or taller than 11'4" need an NPS escort
through the historic 1.1-mile tunnel, and the 23' International is
over the width limit. We're bypassing entirely via Hurricane and SR-9.
Adds ~65 miles, removes a real risk.
The Hogback (SR-12 between Escalante and Boulder)
A knife-edge ridge of road with thousand-foot drops on both sides
and no shoulder. Stunning, terrifying, slow with a trailer. Don't
stop on the road, use the marked pullouts only.
Eisenhower Tunnel + the descent to Glenwood Canyon
11,158 ft summit, then a long downgrade through Vail and Glenwood.
Trailer-brake controller dialed in before the descent; charge to 90%
at Frisco so we have headroom for the regen on the way down.