Look at the web sites for the manufacturers of your tow bar. Whether it be Blue Ox or Roadmaster, or whatever, they all will offer advice. A lot of issues of Motorhome magazine also have articles on towing, but you would have to search for them in past issues. The dealer that sold you the tow package should be able to help too.
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee,with Hemi, hooked up with a Blue Ox Aventa LX, and Brake Buddy.