We are planning a trip for 6 nights for the second week of August. We currently have reservations with a pin code for 2 rooms at POFQ (family of 6 w/ 3 grown kids), but I really prefer the Epcot Resorts location. BC & BWI are out of our price range, but I'd definitely spend a few extra bucks for Swan/Dolphin for the location. 
Any advice on who to book with and when to get the best price?

Any advice on who to book with and when to get the best price?