I'd read posts from Bedlam, Vinsil and Grit Dog.
That's what I did. You'll notice I run a similar set up to them (well, Bedlams old rig). It can be done. That's a beauty of a truck you have. 19.5" tires are likely in the cards for you. I upgraded my tires to 3750lbs and I'm under the limits but not by much.
Would I like a dually? Sure. But I have a very good truck which has been baselined by me for 6 years. For a few grand, I made my truck more capable and have been running that way for a few years.
As mentioned before. Tires are your real true limitiations, address this first with going to the scale.
My camper is a pinch lighter than the AF811 but I'm roughly in the same ballpark.
