Agree MM is just great, couple of other things i would add:
Don't wait for a whole group shot if anyone (or two) are waiting for others to come off a ride or whatever and a PP photographer is around get a couple of shots on your own. We got some great ones when I was with just one or the other DD. We find that if the PP photographer is not bust they will take as many photo as you want in whatever groupings and from whatever angle (towards the Castle or towards the Tomorrowland sign for example)
You do get a lot of photos, so I make short movies of the some of them using a free programme called photofilmstrip (it's old but still works great.) This uses the Ken Burns effect to make great little movies of your favorite photos which I overlaid with music from Disney.