Here's some of the things that we take out on the boat, to the beach, water parks, and pool side. I don't bring all of this every time, just listing things that I rotate out.
Cold rotisserie chicken, I pick one up from Publix the night before let cool completely, de-bone, pull off the skin so that all I have is meat, put in a container so its ready to go in the morning. If DD and SIL and DGS are going with us I get 2 rotisserie chickens. If you want, you can use some BBQ, Ranch, Blue Cheese dressing for dipping.
Cooked, deveined, shelled shrimp - you can go with or without tails. You can buy a bag at Sam's or the Grocery store. If its all of us, I take the whole bag, If only the 2 of us just enough for the 2 of us. Cocktail sauce dumped into a plastic container.
Prosciutto and Mozzarella Roll, like you get in the deli section. Lots of interesting items here in these cases.
Olives, Pickles, Marinated Veggies in a jar.
Individual wrap cheese, baby bells, laughing cow, sticks, or small chunks - I find the warehouse stores have really good selections.
Summer Pasta and veggie salad - tri colored pasta then add in all the veggies you like, then I normally go with some kind of zesty Italian dressing. Keeping the tomato separate until ready to serve they get to mushy. All Recipes and Food Network have some good recipes for a variety of salad with out mayo
Raw veggies and Fruit, dips to go with.
Crackers, Chips, Pretzels, dips, spreads, salsa
Individual - peanut butter, apple sauce, raisins, peanuts, or trail mix
Water, soda, Gatorade, juice boxes.
I am the queen of plastic containers, and ziploc. Most of the I double bag and then into a container to keep the water from then melting ice out and if the Ziploc leaks keeping whatever in the container. I always bring a trash bag and extra Ziploc's for leftover items.