Soak Chia seeds and drink the gelatinous mix. I have a bottle I guzzled this morning after my 7am 20 miler. Great Omega, protein and hydration combo.
A doc coach of mine said you need to piss clear. Any coloration is telling you you're not getting enough hydration during camp.
Plus you gotta setup a balanced meal plan if you're going to get through a camp without going bat shit crazy.
Casuals shouldn't have much problem with less than 3hrs a day less than 4 days a week...Unless you eat like shit to start with.
Time to cut out the fast and pre prepped frozen food, learn how to roast a chicken, steam Broccoli, cook red/black beans and make decent Rice and Pasta that doesn't come out like wall Spackle.
U gotta fuel that meat powered skeleton, LOL!