You could make the party almost like a tapas (appetizer) party with lots of different items available.
I would do it with a fall theme- squashes, pumpkins, cranberries, etc also make a great ingredient as well as great decorations. I think you are going in a great direction with the turkey and ham ideas for sandwiches. That way you can prepare a lot of the items beforehand and not have to keep them all hot. With that many people, I would possibly prepare 3 18-22 lb turkeys and 2- 3 spiral hams. You might think some of these recipes are weird but they have been people pleasers for me in the past.
Corn Dip
2 cans Shoepeg corn (drained)
1/4 cup chopped onions
2 cups grated cheese (Jack/Colby mix)
1 cup sour cream
2/3 cups mayonnaise
10-12 chopped, de-seeded jalapenos (I usually use at least 14 to make it spicy and include a few seeds)
Serve with Fritos
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Creamy Pumpkin Dip
2 8 oz pkgs cream cheese, softened
1 16 oz pkg powdered sugar
1 16 oz can pumpkin
2 tsp ground cinnamon
1/2 tsp ground nutmeg
(I do cinnamon and nutmet to taste)
Beat cream cheese at medium speed with electric mixer until creamy. Gradually add sugar. Beat Well.
Stir in pumpkin and spices.
Serve with graham cracker sticks or ginger snaps.
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Meatballs
1 large bag of frozen meatballs from Sam’s
2 16oz cans jellied cranberry sauce
6 Tablespoons cider vinegar
4 Tablespoons brown sugar
2 Tablespoon prepared mustard
cook and stir over medium heat until sauce is melted
add meatballs and simmer uncovered 10-15 min
Or slow method is mix all of the sauce ingredients in a bowl and set aside for a minute. Put the large bag of frozen meatballs in large crockpot. Pour sauce ingredients over the frozen meatballs and cook for about 4-6 hours or until the meatballs are heated all the way through. You can serve directly out of the crockpot too if needed.
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Cranberry Salsa
1 can whole berry cranberry sauce
1/2 red onion, finely chopped
1 med jalapeno, finely chopped
1 bunch cilantro, finely chopped
1/2 tsp cumin
1/2 tsp salt
1/2 tsp pepper
3 tablespoons lime juice
Mix all ingredients together. Cover and refrigerate for several hours. I always double this recipe. Be careful with the red onion, if it is too hot, don’t use as much, otherwise it will overpower the salsa.
Serve with bagel chips or tortilla strips
Good luck