I'll re-hash..
I'll contribute to Toro's carne asada cooking on the first night and contribute 3lbs of meat. I can also kick-in/purchase supplies for the community breakfasts or dinner on the second night. It's been a long time since I've camped and I don't want to try to cook for a large group until I can re-hone my skills, and I have no particular specialty that I can contribute.
edit: Back in the day when I camped with my dad and brothers, we always did a campfire stew; meat, carrots, potatoes, celery, seasoning, etc. in individual foil packages or sometimes in one big package cooked directly on the coals. The foil method would be hard to do with a large group, but if someone has a Dutch oven we might be able to do something similar.