As stated I don't think it's a problem going to other tryouts especially at the younger ages.
It's actually not a bad thing to get to other tryouts with your kid. They get to know other coaches, have opportunities for pick-up play and if things go south they can find a team. Plus they meet new friends in the softball world. Instead of facing them on the field, they get to stand in line next to them and get to know each other.
I have encouraged several people to go to several tryouts just for the experience.