I've been working on a general purpose cargo system for the tailgate. I like to configure my Jeep specifically for the needs of an expedition and when using the Jeep for daily driving I don't want to have to have lots of hardware permanently installed on the Jeep. The idea is that specific carrier(s) for whatever I need to carry on the particular expedition can be installed quickly and when I get home the hardware can be quickly removed.
What's I've designed is a receiver-based system - there are two receivers that mount to the Exogate and the various cargo accessories mount in the receivers. The receivers stay on the Jeep all the time and aren't really visible because they're between the spare and the tailgate, and the accessories mount as needed in the receivers.
I designed this system so the same hardware also works with MORryde's JK tailgate reinforcement and I've been using a prototype on my JKU for a while now. I just installed a second prototype on my LJ for testing.
So far I've prototyped three cargo carriers for the system.
The first is a bicycle carrier. I do a lot of cycling and like to take my bike to interesting places to ride. And sometimes when I drive to Florida to visit family, I like to bring a bike carrier so I can borrow my brother-in-law's bike down there and take it to places like Sanibel for a nice ride on the island. I don't like the bike carriers that are on the market - the ones that install in the hitch receiver prevent opening the tailgate, and the ones that strap to the spare are awkward to install. And none of them fold small for storage when not in use, making it inconvenient to bring the carrier on my trips to Florida. This design takes care of those issues.
This new bike carrier stores in a bag and doesn't take up too much space in the Jeep:
When in the bag the carrier fits under the back seat of my JKU, and probably would fit under the back seat of my LJ although I haven't tested that yet because the back seat isn't in the LJ now.
There are two arms to the carrier; they fold for storage.
Here's the bike rack installed in the cargo receivers - forgive the Jeep being so dirty, it spends its winters with a plow on the front and I usually don't wash it until the plow comes off at the end of the season:
Since the carrier is attached to the tailgate, the tailgate can be opened when bicycles are on the carrier:
I've carried my bicycle thousands of miles on the bike carrier with the system installed on my JKU and it's worked great. The same hardware on the JKU: