Most meals just sort of happen organically. Some people go out to eat and sample local beers, others cook in their campsites, some have special diets, etc.
What we do is gather for a campfire every night. Everyone is invited, no matter where they're staying. This year, 94 has reserved a dedicated site for our evening gatherings. Someone named Dicey (and sometimes others, but that is not a requirement - I always bring too much) contributes supplies for S'mores every night, including vegan marshmallows, so that can be relied upon. (NOTE: fancy dark chocolate doesn't work as well as plain old Hershey's milk chocolate due to differences in melting points. Lots of scientific experimentation has been conducted.)
Having said all that, I'd be up for hosting (or co-hosting) a taco bar one night. We're traveling in a fancy pants (but 10+ years old and purchased used, haha) rig, so I have some ability to bring along communal stuff.
One of the reasons Mr. Dicey and I are going in early (besides the fact that we have to leave early, boo!) is to look at organizing the campsites to be as mustachian-friendly as possible, such as connecting sites to create a shortcut to the bathrooms, dishwashing sinks, etc. Also high on our list is figuring out ways we can gather without being a nuisance to neighboring campers. The sites here are [tiny]. For example, if several people are assigned adjacent cabins, and they're amenable to it, we could slide a couple of picnic tables together to create a communal dining space. A family group did that a couple of years ago. They moved the tables together, put down tablecloths, and added string lights. It worked great.
Ninety Four is off to CM*TO (sob) and has another cool trip right after that. Just about the time she returns, we'll be heading for Moab. Because of our schedules, I'm going to be posting some Meetup-related stuff. She is still our Supreme Organizer, I'm just helping out with some of the logistics.
Keep in mind that a cornerstone of the Magical Moab Meetup is that There Are NO Strict Schedules! Everyone can come and go as they please. Part of the fun is seeing what kind activities people come up with each day.
Coming soon, I'll have a couple more announcements/questions, so stay tuned for more Magical Moab Meetup information.