Couple I'll recommend for next year (in order of schedule date):
Beavercreek 18O Invitational - Bob Darden has a history of treating teams well, had 14 teams show up. Top half of the teams coming out of pool play go to the Gold Division, bottom half to Silver.
Candlelite Knolls 23U invitational - Greg Bensing has a nice facility and went out of his way to make the experience fun for everyone. This was a full seven inning tournament scheduled for 1:45-2 hours per game; our Saturday game with the Pittsburgh Pride went to somewhere around 3 hours before we got 7 innings in.