Hi Joy,
Welcome to the Disney Parks Moms Panel! I'm so excited to hear you'll be purchasing
Memory Maker for your family's visit to Walt Disney World! I've used the service a few times myself and can't imagine taking a trip without it now. With just 1 day in the parks, I can certainly understand wanting to get the most out of it. Happily, there are literally hundreds of locations where you'll find
Disney PhotoPass photographers around Walt Disney World! Those spots include the park entrances, in front of main icons, at many character greetings at character dining locations and on select attractions. I'm not aware of a full list of locations where
Disney PhotoPass photographers can be found, but there is a fantastic interactive map that's available on this
Disney PhotoPass Service page that shows places at Magic Kingdom, Epcot, Disney's Hollywood Studios, Disney's Animal Kingdom Theme Park, Disney's Typhoon Lagoon Water Park, Disney's Blizzard Beach Water Park and the Downtown Disney Area where you can find those photographers.
Wishing you a picture-perfect visit, Joy! Please let me know if you have any other questions as you make your plans.
Beth