Think some of these guys are doing bead breaking in air conditioned garages, not in the middle of nowhere bathed in sweat. I could not do it with only levers. Finally remembered the side stand trick which worked perfectly. Had a bunch of instant village helpers though. Never tried it by myself, think it would be a handfull.
Upon returning home first thing I did was to mill off part of the locking bead as per Woody Wheel Works. Did about 8 inches on each side directly across from the valve stem using a router and a wooden jig. Details on this site somewhere with pictures. Very easy to break the bead now using only levers. I have a set of the giant pliers which are called the Tire Wizard I think. Works well in the shop but simply too large and heavy to take on a trip.
Note the plastic bag disc protection device....
