Ideal school parents and ideal all star parents are a bit different to me after experiencing both.
For high school, my number one thing is I want a parent that holds their child accountable. When their kid wants to skip that away game because it's raining, they say no and tell them to honor their commitment. They won't lie for their child and tell me their kid is sick to cover for them. When they aren't point flyer or jumper, they tell them oh well and to work harder. We do TONS of routines and sometimes you'll be in the front and sometimes you won't-that's life. Don't make excuses, don't tell them they are the best and if the coach doesn't realize it just quit. No. Just no. Be their biggest cheerleader and help them work through it, but trust the coach.
Second, help with fundraising. We need all the help we can get!
But really, if you are good at the first thing I'll semi forgive a lack of fundraising. :)