No expert, but here goes my experiences with flat towing.
I flat towed my jeep on 2k mile trip two years ago with a 30' class c ford, jeeps are very very heavy, as such very slow going up & down hills as mentioned.
Braking; I did not have a braking system for that trip, it was very difficult to stop in an emergency situation...I had that, "emergency situation", I was lucky nothing happened, but I swear I could hear the civil lawyers screaming for joy!
Upon my return i got a brake buddy(pricy)for the jeep, helps alot to slow that thing down. I would not tow without some type of braking system, not safe....not legal, I know first hand.
As for backing up,you can...for about 3 feet then the wheels get all goofy!, NO BACKING is the rule when flat towing it.
Someone else here posted nightmare photos of his jeep when his jeeps transfer case popped out of N and destroyed the tranny, transfer case etc etc. When I tow I'm anal about checking & rechecking to make sure the transfer case stays in N.
Others have not had good luck but it is "approved" by jeep......
Lighting:I wired up another bulb into the rear tail lights(tight fit) and ran a wire to the front, that way i would not have to cut into the jeep wiring or do the diode thing.
or Harbor Freight has a coupon for the magnetic lights for $9.99
Also on long trips the front tires wear funny like cupping, can't explain why maybe someone else can. I think it has something to do with being dragged as opposed to being pushed.
I would love to trailer my jeep on trips but that would be an additional 3k +lbs to pull, my ford 460 was not happy pulling the jeep, let alone another ton of trailer.
Hope this helped