From my experience most championship games are 7 innings. We have been in very few with time limits. Honestly, when we played 18u, 90 minutes was sometimes enough to play 7 innings anyway.
Wow! What, may I ask, is an entry fee for a tourney like that?The tournaments that my DD's team usually play are 7 innings, no time limit and three umpires.
My DD has done 7 innings in 12U before....thanks to E6 and E7 in innings 5 And 6... two outs both times.When I coached in the 10U/12U days, going 7 innings would have been very difficult with the pitchers I had.