We bought the pre-purchase CD for our trip in September/October last year and had about 250 photo's taken whilst there, we tried to catch as many photographers as we could because we don't have any photo's of the 4 of us due to DH usually being behind the camera.
When we got home I viewed all the photos on line and added borders etc to them, by the time we ordered the CD there was 1500 photos on it as i'd basically added a different border to every photo and yes it took the whole 30 days to do it
Be warned though, I had a monumental problem with ordering the cd (the code was never accepted) because apparantly the code you get is only good for 3 months from purchase, I purchased mine a year before we were going
This 3 month expiry though is not indicated on the website and was never confirmed by the staff members I had to deal with to try and get all 1500 photos back, which took 2 months by the way but they are here now and they are great and now I just have to save some money up to go and get them all printed off for the albums!!!
Find the first photographer and have your picture taken, take the card he gives you and use this for the whole duration (take a photo of the number on it just in case you lose it), it doesn't matter how many cards you get because you can get them all put on to the one card later on.
Also, if you want to have the photos with tink, stitch and simba just ask because we found that they didn't do this willingly even though we have kids so were disappointed that we didn't have more like this.
I will definitely be doing this pre-pay CD next time because it has saved us a fortune and was great having all 4 of us in a photo together.
Next time I will do it within the 3 months!!