I knew someone carried alll of this gear. I'm slowly building my stash.I actually have 5 pulleys and 4 straps/ropes and have done this twice once to practice and once to get out of a hole. The one thing he didn't mention is it takes a LOT of line/cable to do this. The distance you want to travel backwards requires 3 times the cable but it does work very well.
I would say it is stupid to put another man on the payroll and truck on the road just so I don't have to go off road alone. It happens in the real world. A couple of hundred bucks in snatch blocks and tree straps is small potatoes if it keeps you from losing the whole day.