Johnnies - that is excellent advice. Many parents would do well heeding your words.
I might add to watch and observe the way the team plays as well as the coaches and parents conduct. Does the team, coaches or the parents do things that might be considered "shady" in most softball circles. (shouting at opposing players while batting or pitching, noisemaking/rocks in bottles to distract players, shouting pitch locations to their batters, unsportsmanlike chants/cheers, constantly challenging umpires, stalling in a time limit game, etc.) You will observe the above, to some degree, at almost every tournament. You should write those names down so you can remember which tryouts to avoid.