I like the idea of baked potatoes with plenty of butter and sour cream available. Maybe even some diced and sliced chives in the bowl. Two cold salads on the side. You can dress it yourself or have different dressings available for the guests to choose their own.
Baked beans served in a bean pot. Start it Thursday night with soaking, bake all day Friday. Keep in fridge 'til party time. They always taste much better the next day. You can heat them up the day of the party. Have some condiments available like ketchup or hot sauce.
Make a large pan of brownies. Buy a bag of Mini Reese's PB Cups. Line them up on top of the batter next to each other and touching. Then push them down into the batter until they are covered. Bake as usual. Cut into small squares when cold. These are very filling.
Definitely Choc. Chip Cookies. Who doesn't like them.
At least two pies. Maybe an apple and a blueberry. Although I like the idea of a rhubarb crisp. With the brownies and C. C. Cookies you need to get away from the chocolate.
A bowl of fresh cut up fruit to cleanse the palate. You can use a half of the watermelon as your bowl after you have removed all the meat of the melon. If you are in the mood for extra work, you can cut a fancy edging. ^ ^ ^ ^ will look very pretty. Forget the melon baller. A lot of work for small pieces. Cut out large chunks and then cut into squares.
Smores are a great idea. Will evoke some happy memories of those folks who were in scouting. At the end of the evening you don't want to be heating up dips. All your cooking is done for the day. Time for you to relax. How about that mushroom pate recipe in another thread served with crackers. Keebler makes some great flavored crackers. You can serve the pate in a round peasant loaf of bread. Cut out the bread inside and cut into croutons. Season and toast for the salads.
I am sure there will be some of the appetizers left over and can still be offered at the end of the day for picking.
And congratulations of 20 happy years. I was lucky if my marriages lasted 20 minutes.
And one for the happy couple.