We purchased our 2011 QX specifically for towing a travel trailer. Here's exactly what you need for towing based on our experience:
1.) Height adjustable towing hitch - The QX sits so high that in order to properly balance the weight of the item being towed, in some cases, you'll have to lower the hitch 3" - 5". They're more expensive, but you'll save wear and tear on both the QX and the trailer.
2.) Electronic brake controller - Even with a small load, having the brake controller makes a huge difference as this enables the QX to control the brakes built into the trailer itself, and makes for a significantly more stable and controllable ride.
3.) QX56 Towing Package - you already have this, but the automatic height adjusting air suspension system in the QX helps balance everything out, and makes the ride while towing significantly better.
Hope this helps. If you have any additional questions, don't hesitate to post them.
Second the recommendation for a height adjustable hitch. The QX receiver is made into the bumper whereas most pickups have the receiver mounted immediately below it. This adds 5-6" of tongue height you will definitely need to adjust to level out your load.
The Tekonsha P3 is arguably the best on the market and by far the most customizable. When I bought mine I got the harness for both my truck and the qx. The P3 comes with one from most places if you look online at Amazon for example. I found the dealer and called them direct from their Amazon listing. They sold me the additional harness for the other vehicle for $8 which allows me to move the brake controller from one vehicle to the other as needed vs having two brake controllers all of the time.
If you have never towed you need to read up a lot on what and what not to do. There are lots of idiots on our highways who drive totally "asleep at the wheel" and distracted. You will need to know how to avoid potential issues and run ins with these people if you plan on doing much of any driving.
I would also strongly recommend making several short test runs with your ride hooked up to see how it responds making turns, etc.
Gas fillups can be challenging if you don't use truck plazas. Don't get into a spot where you can't get out of easily.
Practice backing the trailer up for everything you can think of. If you back up your qx then do the same procedure with your boat trailer attached. It will make a huge difference.
Don't be too proud to have someone spot for you on your blind sides outside of the vehicle but in your mirrors where you can see them.
I just completed a move from Michigan to Mississippi towing a 24 ft v nose car hauler behind my pickup. It's a 14 hour road trip one way. I hauled 3 loads down. So 5 trips altogether with the trailer both loaded and unloaded. I've been hauling/towing trailers all my life but there were some things I'm glad I thought about ahead of time otherwise I would have had some real issues.
One was allowing my Dad who is a retired commercial truck driver to back my trailer into our new home's driveway the first morning. He got in a hurry and while I was trying to get him to stop he promptly jackknifed the trailer nose into my rear bumper punching a basketball size hole in the diamond plate ($80 for new plate) and warping my rear bumper ($550 for new bumper). All of this could have been avoided if he would have waited just a moment to let everyone get in position to guide him. He was so focused on getting the rear of the trailer to the right spot in the drive that he forgot about the front end. Rookie mistake by a man that has pulled and backed more trailers than all of us combined.
Point is that it happens and rather than being too proud to ask for help just ask. You can swallow your pride with the cash saved from the repairs you won't have to make after the fact.
Fwiw I backed the trailer the other two times with zero difficulty because I waited until I had plenty of people watching all of my potential problem spots and I took my time slowly backing it in. If I had known my Dad, who taught me never to do what he did, would not take his time and do it right I would have made him wait until I was available. Unfortunately I had a conference call for work that am and he didn't think we needed to wait.
Understand I know nothing of your driving skills or towing history so I'm not assuming anything. Just pointing out that it takes skill that is easily achieved with time and focus. Towing isn't something you just slap a trailer on and go for sure although I know many who have and it scares the hell out of me. Especially any time I see a UHaul, Hertz, etc. trailer on the road.
