Bump for this RR.
The riders on these kinds of trips form friendship bonds that last. If you're reading through and think you would like to experience this type of adventure, then continue to prepare and gain skills and be ready for one you can fit with.
This trip could only have been a pipe dream for me just a few years ago. A friend sent me a link of adventure rider photos (ADV Intro) some years ago, and it completely changed my outlook on motorcycling. I knew right away these were the kinds of adventures I wanted to pursue.
The adventures people share on ADVrider don't just happen in a vacuum. It takes years of practice and planning, and preparing yourself and machine for them.