Lucky for me it was down to a location where it could be truck loaded, walked 2 kms. Additional luck, the dealer was able to zip out using another machine's winch lift it to slip the track assy back on and spin on two dodgy lug nuts to drive onto the truck.
Got underway again today, with new studs, antirotation bar on order, locktite on the nuts. Not sure if I found a loose one or if I loosened it, wrenching with mitts is not my favorite game, but checking these are going to be routine for a while.