I can speak from a coaches perspective on this as well as a parent. I know it is frustrating for many families but the teams are in a no win situation. We have scheduled our tryouts for the 5th of August. We finish up our season the week before so we want to hold tryouts right after and then give the team a break. You are also racing every other team out there to try and get them scheduled. So the only option would be to try and find a weekend when know one else is having them but then there is the possibility you will miss out on the girl that would be the perfect fit because she jumped on the first offer she saw. You can't blame them because they are in a situation where they don't know if they can wait for another tryout if they have a solid offer.
And then you have those coaches that are always looking for the next/best replacement players for their current ones because they don't know how to develop them themselves. They tell last years' players that they'll contact them but never do while filling the team and leaving 1 or 2 spots open for "studs" they'll never get. Meanwhile, 5 families are sitting on the sidelines hoping to get a phone call to go back. Several weeks later, the coach "settles on," the players that haven't been offered and hung out waiting as opposed to going to other tryouts. Of course those players see limited field time if any at all. I wish everyone the best of luck finding a home this year!