Birdmom,
The way the meet and greet has been going is that it's at California Adventure in Ariels Grotto (where they also do the princess meals) from opening until 11:30 am. You don't have to make a reservation to do this and you are allowed one pic per day. So if you are staying 4-5 days, you can get 4-5 pics, even more if your spouse has a card as well.
Hope this helps a little,
Kathy