Hello cable guy,
Here is a quick video on how to adjust the Bilstein 5100 Series Ride Height Adjustable Shock Absorber http://jo.my/5100adjustable I would suggest adding a Air Helper Spring kit to the rear of the vehicle http://jo.my/8moj5k This will allow you to add air/height to the rear of the vehicle on the fly when towing. Have a look at out helper kits and feel free to ask any questions you like. We would be happy to help you with a solution. Thank you for the email.