There's a self-supported loop nearby that I've had my eye on for some time. ~25 miles hiking up a canyon followed by ~55 miles down the mountain on a bike. I'm aiming for doing it in a day, but might want to turn it into an overnight. The beauty of really light backpacking loads is that I could still be under 40 pounds, even with my 30# steel beater MTB on my back. I thought about simply pushing the bike the whole way, carrying it when necessary (mounting a shoulder sling in the frame), but the canyon has too many stream crossings and short boulder filled stretches to have my hands tied up.
Out playing around with packing configurations earlier; very subjective to pack type/bike, but I found a pretty quick way to mount the MTB securely on my Kelty Satori.
It seems that taking off the pedals is worth having to carry a pedal wrench. Dropping the seatpost would likely be a good idea too.
I'm now trying to figure out ways to get the broken down bike on and off the pack quickly (it's hard to access pack contents with the bike on it).
Anyone else like carrying bikes on their backs? Any tips/thoughts?