I've done both - digital pics and scanned. So I'll tell you how I did each...
Digital Pics - It took a while to figure out how to get the best quality but what I found works best is to set up outside on a sunny day. That way it's bright enough not to need a flash that causes a glare. Lay the page(s)/album flat on a low stool or box in a bright area but not in direct sunlight or in shadow. Stand directly over the page and look straight down to take the picture. If you have a tripod that would be best. I also find I get better pictures if I take page protectors off to do this.
Scanned - You have to can twice to get a full (or almost full) 12x12 page. Most scanner beds are only 11.5 inches long, so you have to figure out which edge is best to lose - or a little from both. Scan one side of the page then scoot the page over and scan the other side. After scanning/saving you need to go into a photo editing program. (I use MSPhotoDraw, only because that's what I have on this computer.) Open the files for both sides of the page. Select the picture from one file, copy it, and paste it to the other file. Now you can line up the two sides so that you get your whole page and save it. In PhotoDraw I have to adjust the background to include the "whole page" but this also allows me to crop any edges that don't match up before saving.
I hope these descriptions help rather than confuse. And FYI, there was an article in CK a few months ago about scanning and stitching pages. I can't remember off the top of my head which issue, but when I go upstairs later I'll look for it.