Having hosted a Meetup in the past, (and likely this year again sometime) and attended several others, I suggest planning for leftovers - have containers or zip-lock bags handy, and plenty of ice in the coolers. Pace yourself with the food, and cook in waves, not all at once. It's no fun to feel stuffed when the next great recipe comes off the grill. Cover all the food groups if you can: Beef, Pork, Fish, Foul, Lamb. Get some dutch ovens going for beans, soups, stews or deserts. Go easy on breads and chips to leave more room for meat. Sample everything you can, and take lots of pics. Wish I could join you!