Help me prep food provisions for a sailing trip

In a few weeks I'm participating in a three(ish) day nonstop sailing regatta. My friend and I have been put in charge of making and bringing food and drinks for the entire crew. We also have no idea what we are doing, so any advice would be appreciated!

My first thought is sandwiches/wraps but for morale I think it would be nice to have a variety of things.

We won't have a kitchen/stove/way to heat the food. No fridge, but a cooler full of ice. (It will probably not remain very cold the entire time.)

The primary goal is to sail fast so no stopping to assemble anything complicated- someone might even be on shift sailing and eating at the same time. Probably nothing involving sharp knives as the boat will likely be heeled over and that seems needlessly risky.

What kind of sammies? Brownies or cookies? What are we going to do about caffeine? Are two day old room temp breakfast tacos gross or okay?