#1 - Don't think 35psi while towing that load with P tires is a good idea. Get those things up to 40-44psi or buy some LT tires and run them at 50-55psi. (XL tires are also good, but I can only talk about UPH...ultra high performance...XL's, which are the best tires I have towed with on two SUV's to date. I have yet to meet anyone else ever trying such a tire.)
#2 - You are over your Gross Vehicle Weight Rating of 6900lbs by 500lbs.
Edit: You are NOT within Gross Combine Weight Ratings. 13,600lbs is Toyota spec...and you are 1,000lbs over. This is a BIG BIG problem and where I would claim you are NOT legal.
#3 - Did you weight the whole thing with your WDH connected? I doubt your rear axle weight would be in spec if you did not have it connected (mine is not) and some of that tongue weight is put back on the trailer as well (200lbs in my case) which regains (cheats!) your payload and gross vehicle weight by that amount. So...in other words...go back and get each axle weight when fully loaded and the WDH is connected.