I have had both a 3.0 V6 and now a 4.0 V6 Ranger. My current Ranger is a 2011 Super-cab 1/2 ton version with factory tow package rated at 5,800lbs of tow capacity. So far, I have towed back from Iowa to San Antonio, then down to the Gulf, out to West Texas, then North to the high hill country. It performs very well. It also has a 5 speed automatic transmission and that helps. Based on my experience I would not tow a POD with the previous standard cab 3.0. My current set up, for me, is minimal.
I grew up on the West Coast and although it is beautiful out there, I really don't have an interest in going that way. If you look at a topographical map and draw a line straight up from Texas everything East of that is pretty darn flat, and that is where I intend to play.
If I were interested in going N West, I would probably consider something with a little more headroom on the Horsepower side, or pump the Ranger up some.
Update Edit: I could force it, but I'm fairly confident that the current setup will fail if I push it to hard. By the time we retire the Ranger will be tired and we'll upgrade then. That's the plan!