Speaking from experience, feeding multiple through at one time is not actually the best option. I did this with some of my old photos (were black and white photos so the color was not a problem) but they got skewed in the process. So when I do try to scrap them, I have to use my software to straighten them. A couple of times 2 photos went through together so I had to redo them separately.
At various times over the years I have done this. I've used feed scanners for photos, flatbed scanners (have one now that I really like and it is small enough to sit on the desk), negative scanners (mine does various sizes) and I've even sent negatives out to be scanned (before I got the scanner I have now). The first attempt was actually a fail. Even though the company said they color corrected, they didn't. All the photos had a green tint to them. I then sent the same negatives to another company and they were great. Color corrected and no backwards wording on the photos (yes, the first company didn't notice wording that was backwards on photos). I will say that both companies were great about the tracking of the packages when sent to them and sent back to me and I always knew where the negatives were. The company I really like is located in Indiana which was great for me since I'm next door in Ohio.
My current flatbed scanner has a feature that I can put multiple photos on the bed and when it scans it saves each of them as a separate file. I may have to make adjustments in my software after scanning at times when the photo isn't the greatest to begin with but it isn't always needed.