Overall we tended to use the same strategy as BOF. In our last tournament we had a big win in the semis and absolutely no chance in the finals. In that one the way pool play set up we only had to win one of two games to make the semis so we threw our weaker pitchers against the team we ended up playing in the semis and one of our better pitchers in the game we had a good shot at winning. Then we threw the best we had for that tournament in the semis and he had the game of his life throwing a 65 pitch complete game. I leaned toward using a kid one day, one game max and that was it for a 2 day tournament. No fixed pitch count but pitchers seldom went more than 4 or 5 innings in a 2 day tournament. A lot of times that meant dipping down well past our usual pitchers when we didn't really want to. Our Saturday pitcher was usually selected due to a couple pitchers who couldn't play on Sundays for religious reasons.
My favorite was LL all-stars where over 5 games no pitcher threw more than 7 1/3 innings total.