Many folks tow with trucks that are just adequate for the load, most of them likely tow shorter distances on flat roads at moderate speeds for vacations. Braking is my primary concern because I tow in mountains alot and am a fulltimer (more exposure on the road). The electric brakes on our trailers are adequate but will fade in hard braking or on long downhills, and if they fail, your truck must safely stop everything. I wouldn't consider any 3/4 ton pickup, especially with single rear wheels, to be safe for my circumstances (and I also have a big Landmark). I heartily concur with the 1 ton dually for your trailer, and make sure it has a strong exhaust brake. JMHO
BTW: If you look at my signature, you will see what most folks consider overkill, and I'm not recommending a big truck. However, I've had incidents where I was thankful that I had the Volvo; one was being rearended by a Silver Eagle bus that totaled the previous trailer and would have pushed the trailer through the truck if not for the massive hitch and truck.