this is my harbor freight trailer I have LED lights, and the brake lights should be separate to be spyder compatable. I extended the rear bumper to carry my 10x10 easy up canopy, it has a tool box and I replaced the cooler with an Igloo 12 volt 120 ac electric because ice is heavy and messy it will carry a lot and tows like it was not there buy the spare tire and grease the bearings before your first trip and all ways touch the hubs with the back of your hand, they should never be hot
Your setup is very similar to what I'm looking to do. Where did you get the car top storage thingie? I'm having a hard time finding a used one in decent shape. Also, I like you electric cooler idea.