

My observation from hiking the Pacific Crest Trail, and also from babies, is that you can burn through your blood sugar in about 2 hours. It doesn’t matter what you eat but target 200-300 calories every 2 hours while working. In a 12-hour shift that might be 5 snack breaks in addition to breakfast and dinner.
I would bring everything you like eating, like a big snack bag, and just eat what looks good for 10 minutes. Potato chips, Cheetos, Nutter Butters (or other cookies), dinner leftovers, trail mix, candy bars, fruit snacks, cheez-its. I like Pro Bars for their caloric density. For breakfast whole milk Greek yogurt has a lot of protein. Smoothie or with granola & seeds/nuts.
On hiking trails, I move rocks and branches, and fix drainage at water bars. Tiny improvements which make the trail easier for all who follow.
In my neighborhood, I pick up trash. Usually I go until I have filled a grocery bag, about 30 minutes. Though people do notice it so it’s only partly secret/anonymous.