At 10U, I bat everyone until the rules say that I cannot.
Agree with everyone, bat everyone on Saturday always.
Pool Play:
-Even playing time in the field for all (could take several tourneys/games to accomplish this. I rotate girls 2 innings on bench and then 2 in field. Most of our games go 4 innings).
-Pool play is a great time to get your best players some rest/bench time so they are fresh for Sunday.
-Find everyone 2 main positions to play, if possible.
-Bat everyone equally. You can keep same order, but I start the next game with whoever ended the previous game in the on-deck circle. At least for fall ball. Spring time you might want to keep same order.
Bracket Play:
-Bat everyone. They are 9 & 10! A plastic trophy is no excuse to not bat a 9 year old. She isn't going to get better by not batting.
-Best defensive positions for everyone, and everyone plays at least half the game. Best players generally don't sit, unless you move into consolation games, but no player sits the entire game...ever.