8... great googily moogily... I have 3 and find that to be annoying. I have 2 identical looking keys, one for the main door, one for the outdoor kitchen. They both look the exact same and I ALWAYS guess wrong, no matter which one I am trying to open.
I have a third key for the storage hatches... at least that one looks different.
I'm guessing if you have 8 different things to lock, you are probably paying a decent amount of money for your rig. You would think they could order all the locks from a single company and use the same lock cylinder...