I have a camelback with only water in it. I know there are some drinks you can mix in there but I keep it pure water.
In game I'll have sport beans jelly beans, Clif shot blocks (margarita for the sodium), and Clif shot gels (chocolate or vanilla). All small enough to tuck in a pocket or in the camelback carrier. All meant to be eaten during vigorous activity, easy to carry, chew, and digest.
For the drive home I'll have a fresh bottle of water in the truck to keep hydrated, and then when home I'll have more water, this time with Nuun hydration tablets in cold water.
Airsoft, where nothing is hurt but feelings.