The current profile I have now is the same one I had when I started with iPhone in 2011 with a 3GS. It's been brought forward as a backup each time and it has suvived jailbreaks on iOS 5, 6, 7, 8 and 9.
But I have a process that works for me and has kept corruption out of the backup.
Don't have anywhere near as many photos as you do though.
However, I could lose everything I have right now and there wouldn't be any issues. Anything important is backed up and removed from my device. I don't leave anything on my devices I cannot afford to lose.