BBQ as you please, or bring something to eat that is already prepared. If ya do BBQ, be prepared to take your coals with ya. Also, be prepared to pack out your own trash/body fluids/ human waste.
As to how many folks will come, your counting of the people that have replied to this thread is as good as mine. As to “timing” the plan is to meet at 1330 hrs.
What happens after that is totally up to us. If a few of ya know each other personally and want to coordinate between yourselves on food prep, have at it. I plan on preparing my food however I feel that day. I may bring a BBQ, and Ammo can to pack out hot coals, or I may grab some sandwiches at WholeFoods and just hang out with that.