I'm going to bring up not volunteering to the little league coach
Why did you want to bring up not volunteering?
He is a cheapskate who forced us to pay for the places we sat
You're clearly frustrated with him and it sounds like you have valid reasons. I would suggest that you do your best to speak about your concerns in a calm and civil way, as you want to be effective and get your points across.
That's true. I'll definitely talk to him.
I wish you the best of luck in resolving your issues with them. Such discussions are not always easy, but as long as you try to maintain civility and respect, you have a much higher chance of getting the results you want.