I bought a AAA diamond pass on ebay. We drove our car and parked, at the front on the parks, and didn't have to brave the tram lines. We just walked right up to our car near the gates and moved on. It was a GREAT idea!
I almost bought one, but after a LOT of reading, the consensus was the AAA spots always filled up first thing in the morning, and there weren't many of them to start with. So few people are ever lucky enough to get them. When did you go with yours?