Photo pass is great! I have about 70 pictures on it. My friend got about 110 on hers. Problem is is that the photographers aren't everywhere you want them to be. I would have missed showcase characters and the great hugs my kids got. That includes Prince John, Belle and Beast, Mulan and who know how many others.
Also, I took almost 400- 500 shots myself with a "big" SLR camera. My kids took their pictures also, with the disposable ones. If they wanted to use it, they carry them theirselves in waist packs along with their autograph books, pens ect.
Dont make it harder on yourself. If they want to have stuff with them , make them wear or carry it!