For the ALCAN trip in winter...
Deep lug mud/snow Goodyear tires on all four rears.
V-bar chains.
Biggest "trucker" tow strap I could find.
Hydraulic jack with a board to increase "footprint"...
Heavy bus and the mud tires got us into and back out of all the camp spots during 5 months of traveling. - October to February.
I was glad to have, and glad not to use all the other gear...