I just use the scanner on my printer, however the scanning area is quite small (9x12 inches approximately). You can work around it with Photoshop, though.
My original pages are 11x15ish when I cut them down to scan, so I make sure to get 2-4 different scans in order to have the entire image. Afterwards, I go into Photoshop CS6, go to File>Automate>Photomerge, select all of my scans, make sure it is set to 'Automatic/Auto', and allow it to stitch the page back together.
I've never had much luck with using just a camera though ; maybe someone else found a trick?