As long as you see everyone's names in your Friends and family list and anyone who has their own MDE account shows the words "can view and purchase my photos" everyone's magic bands should be captured when they ride or go to a standing photographer. You can check while on your trip or soon after and if any pictures you expect seem to be missing, you can use the online report form of call to describe the time/location/description of who should be in it and they're pretty good at finding missing shots.
My favorite MM tip is that if you do Jedi Training Academy, Enchanted Tales with Belle or Pirates League, you will get a card from the photographer with a code on it. You *can* enter this code into your photos section of MDE to upload all your photos, BUT I highly recommend that you instead take that card to a photopass shop (one near each park entrance and at DTD) and have them upload for you. Reason: the photographer takes tons of great pictures of ALL the participants in the show. If you upload yourself, you cannot pick and choose just your own family's pictures, you get all the strangers too. At the shops they can help you quickly select only your own photos. The web site is slow and its a real pain to have dozens of extra pictures slowing down your page.