I finally replaced the hinge pins on my '91 Navajo... using common tools.
I lowered the window and supported the door with wood shims on two jackstands, and an 8' ladder to straddle to door with a set of tie-down straps to provide overhead support to each side in a V to the door handle, balancing the tension.
I started with the top hinge, using an electric drill with as basic metal grinding bit to eat through most of the top rivet until it was ready for a few taps with a hammer and chisel to remove.
Then, I used a nail set to punch out the pin. Then, I loosened the 13mm bolts to remove the hinge so I could punch out the bushings, again using a nail set and hammer. Replacement was simple and quick, and I was on to the lower hinge...
With the top finished, the bottom hinge was easier with better access, and when it was time to remove the 13mm bolts, after the initial torque, the ladder V support worked so well that the bolts were removeable by hand, and the door didn't move a millimeter... pin replacement was a breeze, and there was virtually no anti-seize, lube, or door adjustment necessary.
Thanks to DeRocha for the tips and inspiration to take this on, and hopefully my improvisation for a few alternate methods helps others as well.