Congratulations on the new rigs! There are those that swear by a solid "A" frame type tow bar, and those that swear at them. The reason I swear at them is I towed our 97 Wrangler over 85000 miles with one. If you are by yourself, they are time consuming to hook up even with a spotter. and I can just about guarantee that if you have one you will eventually miss a scenic location, or avoid a beautiful narrow road not suitable for your RV because of the hitchin' hassle. Any adjustable arm tow bar will make hitchin' up a whole lot easier.
There are many base plate options available, and only making sure that the one you choose will work with your chosen tow bar will do the job. If you plan on 4 wheeling, you may want to consider ground clearance, but for most folks that isn't an issue. If you choose to use the stock bumper, Currie Enterprises makes a skid/base plate that might be of interest to you. Our aftermarket recovery bumper with D-ring shackle brackets similar Tom and Kat's photo above serve as our base plate. There are several makers of tow bar adapters for this type application, and Blue Ox offers this adapter now...
We use a Blue Ox Atventa II tow bar with our '13 Wrangler, and a US Gear Unified Tow Brake for our supplemental brakes. I like the UTB for several reasons. It is the easiest supplemental brake system to hitch up with your Wrangler. Once it is installed, there are no switches to flip, no control box to set on the floor (BrakeBuddy and Roadmaster EvenBrake models operate this way), just hitch up and go. The toads brake sensitivity is adjustable from the towing vehicle while in motion. When properly installed, It comes with emergency break-away capability and towed vehicle battery charging line. One big advantage of the BrakeBuddy and EvenBrake systems is their ability to be moved from one vehicle to another. Other systems are not vehicle transfer friendly if that matters to you.
Another option you may want to consider is NSA's ReadyBrake
. This is a completely mechanical system that operates by momentum and a cable hooked up from the brake pedal of the towed vehicle to the tow bar itself. I prefer a brake system that energizes the vacuum brakes and doesn't use brute force to stop the towed vehicle, but that's my opinion, and many folks love this system.
I chose the CooltecLLC.com
wiring harness for our JKU.
Don't forget you can't back up. Oh you may be able to back in a completely straight line a few feet, but even the slightest deviation from straight and you will quickly learn it's not a good idea. To tow your '13 Wrangler, you won't need the key in the ignition. Put the transfer case in neutral, the transmission in any gear if a manual or "Park" if an automatic, be sure the emergency brake is released, and away ya go.