You've got ribs, chicken and pork for meats. I would be surprised big time if you didn't have lots of leftovers with the amount of product you are planning. For only 60 people three meats is a lot along with your beans, mac and cheese, pasta and fruit salad. It looks like you are planning on each person to eat 4 ribs, two + pieces of chicken, 1/3 pound of pork plus beans, mac&cheese, pasta and fruit salad. Can you eat that much? You can control portions much better if you have servers for the meats, if you don't people will load up and mess with your portioning. I have my servers ask if they would like chicken, ribs, pork and if so - one or two. They can always come back, remember they are at a function and will be talking to friends, they did not come to eat and eat.