This trip didn't have any major hills, but it did have a number of minor ones. No worries about power towing the 19 with a Frontier.
Bruce: I understand what you're saying about tandem axles. It hadn't occurred to me that the tandem axle would feel different than a single axle, but it makes sense.
btw, related to an earlier thread I started regarding the tandem axle... Parked on a fair slope, I dropped the hitch jack as far as I could to level the trailer. While in this position, I torqued the lug nuts on the trailer wheels, and found that applying 100 ft lbs on the rear wheels was enough to cause the wheels to spin a bit -- by lowering the tongue jack all the way, almost all of the trailer's weight was transferred to the front wheels. Arguably, that's too much. So just because you can level the trailer with the jack doesn't mean you should. When I parked again after this trip, I put some additional blocks under the rear wheels so I didn't need to lower the jack so far.
2013 Escape 19 ("The Dog House") , 2012 Nissan Frontier