Re: Bicycle rack location on 2011 Bighorn3670RL
If your Heartland has the brackets on the frame for the receiver hitch that we offer as an option, I would not think it would void the warranty to order that receiver hitch now and bolt it in place.
Just contact your dealer or Heartland Customer Service to order the receiver hitch that will bolt up to those brackets. Bear in mind, this is a 1-1/4" receiver. We will not offer the 2" receiver. Reason being is that as a manufacturer, we cannot control what an owner does with the hitch. Some will tow with it, some will overload it. By supplying a 1-1/4" only option, what is done with it is more controllable.
This all said, many customers hire out to a shop to design, fabricate and install 2" receivers. Even dual 2" receivers. Many have had success with this path. Just know that Heartland and our frame supplier, Lippert, cannot condone it and can void the frame warranty because of it.
Jim