i was in your shoes a few years back. here are some good ones i would recommend:
not sure where you are, most of these are in the northwest ohio area:
sharks memorial day classic (toledo, OH)
kearsley summer slamarama (grande blanc, MI)
van wert fastpitch tournament (van wert, OH)
heart of ohio final fling (marysville, OH)
arden kessler classic (plymouth, OH)
hope this helps. i was able to find a lot of B tournaments at eteamz.com and leaguelineup.com
good luck!