We tried the BYO Meat thing for some family functions and it failed miserably. Everyone was trying to grill, some people's hamburgers fell apart, others burned...it was a fiasco. Now my parents buy all the burgers and dogs, that way all the sizes are consistent and you can just start grilling. Everyone else brings sides, munchies, desserts, etc. I'd either get the hot dogs and burgers or do a pot luck. Have everyone bring something to share, run some extension cords so those who bring a crock pot can plug it in, and have some coolers and ice for things that should be kept cool till it's time to eat. Maybe it's a regional thing, or just my huge family, but all our parties are BYO something!