Oh yeah...I hear you on grabbing all the sodas when you get them for $1 a case or something. I'm all about profit margin on this shite.
We do the 1/4 lb Costco patties. A lot of the standard stuff, as well - hot dogs, candy, snow cones, drinks - but we have a neighborhood family who offered to make breakfast burritos for A Meets. Those things are MONEY.
Travelling tacos (taco meat and toppings served in bags of Doritos or Fritos) are probably the biggest seller for us. Amazingly, Cup Noodles sell like hotcakes to the bigger kids, even on 95-degree B Meet afternoons. Kids are so weird.
We're talking about doing pancake-sausage roll-ups next year...