At this weight you most likely do not need a Weight Distribution hitch. You may want to look at sumo-coil for the rear springs. Helps a lot. I would not bother to get the sway control until you pull it a few times.
Yes on the electric brakes and a moderate priced controller. No need for top of the line for such a light tow.
Try the Honda Ridgeline Owners forum where many of us Ridgeline owners hang out.
This topic has been talked about there many times with several experts that know the trucks frame and handling.
