There are a lot of the important details left out so we have no real way to look at specs and see what's up.
The two big details that you will need to look over are what amount of power the repeater dock uses, not just what they spec for fuse but what it actually expected to use. Then the other point is how much power the side marker circuit which now has a camera on is using currently.
The idea is that some circuit do have some "slack" between what is actually being used and what the wiring and current fusing will support. If the existing side marker circuit is using 12 amp on a circuit rated and fused for 15, there is no way, you can get away with adding 15 amp more to that circuit, so it is a matter of seeing what's up now versus what amount you can add and still have enough slack to avoid blowing the fuse too often.
2015 Winnebago Vista 31KE on 2014 chassis