I have an 07 Ridgeline and it tows our rig just fine. Its a 21ft Sea Fox DC and wet I figure is around 3900-4100 lbs--Dual axle trailer with surge brakes. The AWD/4WD whatever system is awesome. The ramps here at Mayport can get very very thick with sand so its imperative to have an AWD/4WD to get out. I love it--Just put in 'D' and putt on out without any drama what-so-ever.
The only vices I have about the truck when towing...Not enough power to drag race an F350 from a light...Mirrors aren't wide enough to see around the boat...Stupid back up sensor goes ape sh!t when I'm hitched to the trailer (my laziness for not shuttin it off)....and the high RPM while towing. The Honda manual states to NOT disengage the overdrive while towing, so the tranny shifts a bit more while towing. Oh and gas mileage goes to crap while hauling a 2 ton boat (around 6mpg). The ride to the ramp has a couple of bridges to traverse and so I get the see the transmission work its butt off. If its pretty flat out, the tranny will shift into 5th and stay, but at the slightest hint of an incline, down a gear it goes. Its not uncommon to see 3500-400rpm for an extended period while towing.
Other than that, I love my RL. Im in construction and I beat the pee pee out of this thing and it takes every bit of abuse I can throw at it. I drive an hour to work and back and get almost 20mpg. Just make sure that you follow dealer service recommendations with the tranny and diffs.
For the record, my pops has a 92 Dakota V-8(Purchased new) and he claims its the best vehicle he's ever bought. He likes it soo much that he STILL keeps it in the garage.