Hey Bee,
Spam, pockets of chicken and single servings pockets of mayo are great addition to any boring meal routine. Mayo mixed with mustard makes a decent dressing. Also canned soup or noodle soups are good. I also find bringing a lot of spices can change how meal tastes. I always find room for small can of jalapeno and tabasco. My typical pack list if I don't have to carry it includes canned potatoes and corn. It's all in just getting creative. I like the dyhydrated meals that backpacking shops have to offer but they are lil expensive but worth it if weight is an issue.
I would grab some more water unless you are not doing salt water trip and will have access to a tap.
I'm assuming that dinners are fish so I would spare you the typical tuna can packing.