You can do it either way. I usually scan mine and stitch them together. The printer/scanner came with a photo editing software. You may have to stitch "manually", but if you have a scanner, it should have come with software. The digital camera we have also came with photo editing software. Adobe Photoshop Elements is another great photo editing software to try, too.
If stitching just doesn't work for you, feel free to take a pic of the LO. Sometimes, especially if I have lots of bulky items on my page, taking a picture is better than scanning. If you take a picture of the LO, I highly suggest doing it during the day, especially if it's a sunny day. What a difference the sun makes...found that out the hard way. LOL
Just do whatever works for you. We'll be happy to look at a LO whether it's scanned or a picture!