That sounds like it would be a fantastic experience!!!! I've heard of places too that you have to schedule a year in advance.... longest waiting list I"ve heard of though was 5 years!!!
Thinking about it though, there should be two wild flocks of parrots in the San Diego area... amazons, and maybe canary winged parakeets.... I think for sure though there are wild amazons.
http://www.archive.org/details/parrots_sanDiego_2006
There's some flocks around Tustin/Los Angeles, and Santa Baraba, as well as conures in San Fransisco.