What I need (nothing) and what I have on a ride like that has more to do with what's available and fancy than making sure I have what I need (nothing). I use cycling as an excuse to eat (often badly) so basically you could do as I do and eat what you fancy, though on a little ride you won't actually need it, unless you've missed a meal.
On a decent long ride I eat every 2 hrs (so every 25 miles basically) but that means the implied 50 mile minimum, I might have a mid ride drink on a 40 though to be honest I can get round a 40m without needing anything, I do carry a bottle of juice but rarely touch it except in very warm weather. I've tried the hydrating bit and spend to much time in the bushes...