Hi Chef Ken,
I've been on a couple of group trips organized by, in this case, a couple. I enjoyed them very much and I got a firsthand look at what is involved, and I can tell you it takes a very special type of person to do this.
I couldn't do it; or maybe I should say, I wouldn't do it. It takes a level of organization and patience that is way beyond me. Even for free, I don't see how you can relax and enjoy a trip with 20-25 people expecting you to take care of their every little problem and need.
Thanks, but no thanks!