Great job. you could cover those wires on the roof with a wire strip to prevent chaffing or something breaking them like a low limb when getting into a spot.
If one were to plug into an outlet just for simplicity, do the kits come with something that will run from the lights to the outlet and you could just plug in when you want lights and remove when it is time to go home. I would just make it long enough to lay flat against the trailer for it to hook up to my outside receptacle and don't want exposed wires on the side of the TT when traveling. tks