I saw my camper mentioned, and figured it was worth a comment.
And please, if you have more questions, do ask. Im happy to help.
Yes, my rear camper lights, as in clearance/tail lights, and blinkers are plugged in in the rearmost of the camper just like a towed trailer would be.
I don't have a photo handy, but if you look close (hard to see) you can see the harness coming out of the camper.
Since I do occasionally tow with the camper, I added a second 4-pin harness plug that is located just to the right of the left-most truck backup lamp.
Again, this is only for the rear camper wall mounted tail lights.
The camper itself is wired independent of the truck, with the on exception being the 2AWG connected to the batteries VIA a large anderson plug at the front of the camper.
This allows the truck to charge the camper battery bank while running. It also allows for charging the truck batteries with the camper mounted solar.
And if the need ever arose, we could even jump start the truck with the camper batteries if the truck battery went down.
Here is a shot of the camper fuse block, and solar charge controller.
All located in a simple shallow cabinet.
I modified the "flush" anderson plug to be flange mounted and watertight.
And finally, and I cannot recommend this enough.... do yourself a favor and wire all all accessories (like the 2AWG camper lead) properly.
One way to do that is to provide a dedicated fuse/relay block. I fabricated ours and placed it in a convenient under-hood location.
Included are fuses for every accessory Ive added to the truck, as well as large continuous duty relays for both the camper (200A) and winch (500A) circuit(s)
All of which are controlled via the overhead switch console from the drivers seat.
And simple wiring diagram I threw together for the project.
If you have a single vehicle battery, just ignore the second battery in the diagram.
I drew it up thinking Id want a second battery. If we winched often, Im sure we would.
But so far, it hasnt proved it a requirement.