'06 Frontier CC, 4WD, six speed manual. 2012 Funfinder 189FDS. BlueOx swaypro hitch. Prodigy P2.
Weighs just under 4000 pounds ready to go camp. A big part of the key here is proper setup of a good WD hitch. Also, when I first bought the trailer, it had load range C ST tires. I pulled it some with those, then pulled them off and replaced them with load range D LT ( Kumho 857 ) tires. That change made a noticeable improvement in towing stability at highway speeds.
Overall, this is a very good match, IMO. The truck pulls this trailer easily. I have had it from the gulf coast to Wisconsin, from Ohio to Wyoming, Colorado, New Mexico, and am now in Arizona. In all normal running, I can get the job done with 3000 rpm, occasionally to 3500 rpm, and on very rare occasions 4000 rpm. Having said that, bear in mind I have a manual trans, which give me 3.69 gears, which is better suited to towing than the auto trans trucks with their 3.30 gears.
I have averaged 12.4 mpg for all my towing miles.
As others have said, and as is usually the case, the first limit you are going to hit, is rear axle load, and truck payload. I travel solo, and am close to both of those parameters, so if I had to add passengers and their stuff, I would quite likely be over the stated limits.
For what and how I do this I love the combo.