Congrats on your new rig.
To be quite honest, I think you should just take it for a few trips before buying a Safe-t-plus. I just bought a 2016 Axis and it doesn't have the steering stabilizer installed yet. I just got back from a 1000 mile shake out trip and I gotta say the rig drove like a dream. I did have the alignment done at a professional truck shop.
Get a good feeling for your rig and how it reacts in certain conditions. Take it from there and then determine what you need. This is my second coach and I learned one valuable lesson: What one need and what one wants are two different competing forces.
You will have a safe and smooth trip if you get organize, you plan ahead, and you drive patiently. Enjoy the ride...
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