HT4094: iOS: About File SharingLearn about iOS: About File Sharing
Currently Being ModeratedOct 12, 2012 8:57 PM (in response to Wmarriam)
Here's an article that addresses your question:
The article says camera roll is backed up by iTunes.
If you think the sync is not working, while your iPad is plugged in to iTunes, click the "Photos" tab at the top right of the iTunes window (while your iPad is selected on the left of the iTunes window), and check the sync options you've selected.