For minimal lights obstruction, I am using this:
For cargo on it, I am using a Pelican 1690 case, and Thule locking tie-down straps. I also added an LED brake/turn/reverse light:
I used a 7 pin to 4 pin plus one adapter for reverse lighting.
There are a bunch of enclosed systems including with swing arms and such as well - most of the big names are pretty decent. I opted for the open carrier so I had more flexibility, but your needs might be different than mine.
