From a Honda guy that has had nine Honda's over the past 20 years and two have been Ridgline's. The first RL was a 2008, excellent vehicle, but what I would call having poor fuel mileage for today's vehicles, 20 hwy and 14-15 in town. Now for my new 2017 RL AWD, much better designed vehicle all the way around, all the way from the larger bed, electronics, and the ride. 26.0 mpg highway and 22.0 in town, average pulling my 2018 17
Casita is 16.3 to 18.8 on the road. I do not use a WDH or the swaybar and the RL pulls like it's not back there, we are talking within reason here. The rear of the truck will set down 1" with the trailer hooked up and both the truck and trailer are riding level going down the road. The RL will also give you a ride that does not feel like you are in a pickup, total luxury at it best. One thing I would suggest is don't go to the the Honda dealer and ask them anything about pulling a trailer with the RL, they a clueless about it, this is probably a turnoff for buyers when all they want is answers to there questions. Probably the best place for your RL pulling question is on the Honda Ridgeline Forum.
Just one last thing, all Ridgeline's are the same vehicle, that is, all drive trains, transmissions, suspension, etc., only differences are in the trim and electronic, just as long as the get the AWD model.
trainman