You have undoubtedly figured out that there are two distinct groups here.
The tow bar group and the tow dolly group. Each method has its pros and cons.
I have towed my Jeep wrangler thousands of miles, 4 down with a tow bar with no problems.
As for auxiliary braking, I have a Brake Buddy Classic. It has failed on me two times. Applying the brakes and not releasing. I cannot recommend this product.
But for installation purposes, you simply set it on the floor, connect it to the brake pedal, then connect your power cable. That’s it.
My Brake Buddy has a power wire from the coach to keep the toad battery charged and does not drain my battery as mentioned above.
You have many options. Good luck and safe travels