I don't know that much about Photo Pass so can I ask a couple questions?
1. Are there set locations where the photos can be taken? If so, is there a place to find a listing of where those locations are?
2. Are they just photos of your with/at various Disneyland locations or attractions or are these photos done with characters?
3. We will be in the parks for 5 days... do we need to have a Photo Pass for each day we are there? And do we need to have a different Photo Pass for each park or will we be given one Pass that we can use for all days and at both parks... and if the later is correct, are you given anything like a card or something so they know you're "collecting" the photos over a period of time?
4. Are they willing to take photos with you own personal camera in addition to the Photo Pass photo or is it that they will only take a photo using their camera?
Sorry for all of the questions but there is so much to learn and figure out before going to Disneyland it all seems so overwhelming.

Welcome to disboards! Don't worry, it all seems overwhelming right now but it will all fall into place when you get there!!
To answer your questions
1. There are photgraphers at set locations and they also roam around as well. If you ask a CM when you go into DL or DCA for a schedule of the character sightings you will find a photographer there as well. I found when I went they were in front of the castle milling around, in front of the Christmas tree.In DCA I found them on the pier at night as well as where all the characters tend to be as well as in front of the Golden gate bridge at night.
2.Yes to both. They can be character pics or just of your family say in front of the castle. - if the photographers are there...
3.You only need one card for the time your there and only one card for both parks. I think 1 card holds 300pics -it may be less - but it is a credit card type of a card. When you first see a photographer they will ask you if you have a card, tell them no and they will give you one. They won't ask for any personal info - not even your name - so don't think that you're doing something wrong by not giving it to them like I did!!

I got a good tip from this board, take a picture of the back of the card with the bar code on it in case you lose it then you can still access your pics when you get home. Also, you can use more than one card if you happen to lose it while your still visiting just get another and you can link them all together on the website when you get home.
4. Yes, they are more than willing to take pics with your camera as well. In some cases my camera took a better shot but in other cases, theirs turned out much nicer.
I ended up buying the cd and it took about 3 weeks to get to Canada.
Have a wonderful time!