Hey, Mark The Mayor here, you probably know that I'm not in Gilbert but it seems like your group needs a kick in the pants to get a meet-up scheduled. :-) Does anyone want to step up and take the reigns? From my experience, the best thing to do is pick a time on a weekend morning, and just pick a public park. Throw it out there and say "let's all get together Saturday at 9:30 at Such-and-such Park." Post it on this page and let everyone in the group know. (It's usually overwhelming and too difficult to take votes and try to make eveyone happy when you have this many people in a group.) You'll probably just get about 4 to 10 players the first time, so don't worry about having all 40 there.
If you have any questions, let me know.