My, we are defensive, my incredibly speedy, unfat, all-knowing friend.
Let's go one at a time.
1) Hydrate. Definitely. Before, during and after.
2) A 60-minute jayvee match generally is split into 2 30-minute halves, with a 10-minute rest/hydration break between.
3) Nobody is asking you to do the mathematically impossible, or physically inhumane. Start the varsity game late, as you suggest you must. Just don't rant about hydration, when you have chances to do so: a) before the jayvee; b) at halftime of the jayvee; c) before OT; d) after PKs, before varsity; e) varsity halftime; f) post-game.