Wow, the thread lives!
Joaquin, thanks for the offer. I finally decided on a standard gear arrangement for this bike for cost reasons, but someday . . . Everyone who owns a Rohloff seems to love it.
I just bought a Park TS2 truing stand and I'm planning to build my own wheels, something that has always seemed vaguely magical to me. I'll probably build a standard set of wheels first (XT hubs, Mavic XC717 rims), then try a Schmidt generator hub on another front wheel. Ever used one of those?
Dave, I plan to make this trip on dirt as much as possible, only connecting on paved roads where it's unavoidable. I want to talk with ranchers and rangers and the Navajo who live and work near the rim. The South Rim section will probably be more on paved roads than not, but there are a lot of dirt trails over on the west side near the Havasupai area, and miles and miles on the North Rim as you know.
I plan to start at the South Rim and go counterclockwise, to Marble Canyon, then back roads as much as possible all the way across to the Nevada border near Mesquite, then down around through Boulder City and east again.
I'd love to hear more about your trip.