You are doing fine, and there are just a few adjustments I would suggest:
100 pieces chicken (legs and thighs)-fine
50 hot dogs- only need about 24-30
DO NOT forget buns, mustard, relish.
10 lbs potato salad\
8 lbs mac n cheese > among the three, probably fine, you will most likely run out of mac and cheese
8 lbs pasta salad /
5 loaves garlic bread
2 lbs baked beans- not nearly enough. You would want 3 pounds dried beans, or 1 1/2 gallons (2 #10 cans) canned
I would add 1 1/2 fruit trays of my fruit tray for 25; kids like it better than salad or veggies.
10 gallons of punch- way to much. I only do 6 gallons per 100 Have some 2 liter bottles of sprit in the fridge and just add in the unlikely event you get low. Have a sugarfree alternative, as well.
62 bottles of water- OK
Add dinner service coffee- 1/3 the amount for 100, see the beverage planning page
