This is a nice size party for not much help. Since this is the supper-time menu, you are a little light on some items, and you do need to plan a nibble table for the time while pictures are being taken after the wedding.
Lettuce for salad or sandwiches 4 large bags spring mix (?)
Blue Cheese Dressing
Use the salad planning table on plan for 100 for amounts and dressings; 4/5 the amount for 100
Meat Tray turkey, roast beef, ham 18lbs- I would do 21-22
Cheese Tray cheddar, swiss and provolone 9lbs
Assorted Rolls 90 OK if the large size, but because of the number of small children, consider doing the smaller ones and doing 150.
Pickles 64 oz
Olives 64 oz
See the condiment table on the sandwich page, use 4/5 the amount for 100
Potato Salad 3 1/2 gallons
Homemade Coleslaw 1 gallon- I would do 2
Pasta/Broccolli salad 3 gallons
Marinated mushrooms 1/2 gallon (?) OK- put a small spoon in the bowl
Mozzarella and tomato salad 1/2 gallon (?) needs about 1 1/2 -2 gallons
carrots 2 lb mini carrots- about 4 pounds
celery 2 heads celery
sweet pepper strips
see the veggie tray page for help on amounts and dips
Consider doing 1 electric roaster full (3 -4 gallons) of scalloped potatoes, hash brown casserole, etc. instead of the potato salad.
For the nibble table, fruit tray (not salad), see the fruit tray page, can be done day before. Crackers and a hot dip- 2 6 quart crocks of spinach artichoke, for example, or maybe one queso. One other item. A punch, about 4 gallons.
For the table beverages, skip the soda unless you have a LOT of teens. Iced tea, coffee, and maybe a kid juice.