Index camera roll media or save to app data

[SDKNinja]

I'm writing an app that, for this examples sake, uses photos from the camera roll to make say, 'fancy photo albums' of some sort.

I'm worried that if the user messes with their image library that media will not be present for my app to display said media in said 'fancy photo albums'.

Should I be saving the images / videos to the bundle / app somehow? Is there some other way to deal with this?

Having the albums fall out of synch because a user has moved or renamed the media would not at all be ideal.

Any suggestions are greatly appreciated!