Here is where/how I did mine:
I bought the LED light strip from Ebay from a seller named PITALAM for $20.00.
They are ‘5M 5050 SMD LED RGB Waterproof 300 LED Strip Light Lamp + 44Key IR Remote’ You need to make sure they are the waterproof ones for outside. It came in a 15ft roll and you can cut them shorter at every 3rd LED. There is a little mark along the strip that shows where they can be cut.
They are12Volt powered, so either wire them directly to something off the trailer or you will need a power brick if you want to run them off a 120 outlet.
I needed an extension for the LED strip since I ran mine down the awning arm. If you have an electric awning there is a plastic cover that pops off the arm that has the motor on it where the power cord for the awning motor runs down. I just ran mine down to the bottom of the arm so I can plug in the controller. The LED extension cord is a 2.5 meter also from Ebay from a seller named sunrisedevelopment 2011 for 6.00
‘2.5M extension cable connector 4pins plug for led strip lights RGB5050’
For power I just ran some wires from the battery to where the controller would be and put a in line fuse in.
So far its been up there about a month and the tape has held up. I cleaned the track first with rubbing alcohol before attaching the tape to it. The extension cord that runs through the awning arm and attaches to the light strip up top, I did put a glob of caulk to hold it there and then just coiled up the rest under the awning arm cover so the other end just sticks out under the awning arm. When I am setting up I plug the controller into the end sticking out a pick and the power cord in and I am good to go.