June, 2007 - When to book/room rates/discounts?

[Cameo]

We are WDW veterans and know every detail about getting discounts and deals there, but have never been to DL and are thinking about doing it next summer. We will have to go after our school lets out at the end of May/early June. When/how should I look for discounts around DL for then? I saw someone mention AAA. What other kinds of discounts might be available? Also, as Southern CA newbies, what else is a must-do? San Diego Zoo? Sea World? Ocean? What else? Thank you!