I would be looking for brakes for the trailer along with the tires. In many States you'll be over the weight limit for having trailer brakes and you want them, anyway. If your Ridgeline doesn't have a brake controller, you'll also need that.
If you were just hauling a utility trailer in the 3k neighborhood, brakes wouldn't be absolutely necessary but towing a big sail up in the air is different.
I would use a WDH and leave it just to recover any body tilt or axle unloading of the front. Honda doesn't recommend one but having enough weight on the front steer tires trumps any presumed damage to the truck. Get one with integrated sway control. Equalizer makes a good one.
Haven't even hit the road or finished your first thread and you want to discuss tires, and on this Forum. :B Sorry, it's a big deal on RVnet:W. IMO, if you can find an LT tire that fits and your rims will be OK with the pressures, get them. There are also good ST tires. I was limited to ST tires and bought Carlisle Radial Trail RH in a load rating bigger than what I had. They are working well for me but haven't seen a lot of miles.
Good luck with the rig and RV'ing.