Is it school holidays in July & August ?
It depends on the school. Most schools are not back in session by August 10th, almost all will be on vacation July and the first half of August. So yes, the parks will be crowded. I would definitely consider front of the line passes wherever you could get them. To me it would be worth the cost, I’m not good at waiting in line. Besides, you’ll get to do more since less time will be spent waiting. You may want to look on the websites of the parks you want to go to and plan out what you’d most like to ride. Have a great time!