We didn't do any character greetings and we didn't get very many photos in our folio. About 5 or 6 total. I think if you want to buy a package, and do character greetings, portrait sessions, etc., though, you'll get lots. We didn't go out of our way to seek out photographers, but did stop when one was available.
All of the photos they did take of us were printed 8x10, which for me was too large for the content of the photo... so we didn't buy any. We asked about having them printed smaller, but that's not an option. Kind of a bummer since I would have bought several at a smaller size... the 8x10s were just too huge!
I think some of our photos never made it to our photo folio (we didn't bother scanning the walls to try and find them... had too many other fun plans and plenty of photos on my own camera!).