Right rd, don,t tow without a brake system. I use the APOLLO from BlueOx, and, like you say, you can feel that "puppy" kick when you need it.It also has an "alert" lite at the dash that confirms the system is working. Many good systems out there at a reasonable cost.
Also if you tow without a brake system (required in most states) your
insurance company can void the insurance.
Happy Travels and Best Regards, Clyde