First off, I know the safety police will arrest me, but I'm still considering hauling a very big boat with my Explorer. Maybe.
I've already logged a lot of experience hauling this for several summers a few years ago:
That boat weighed 4,300lbs dry. I estimate that loaded with fuel/fluids and the trailer added, it had to weigh at least 3 tons. IIRC my '99 Explorer 4x4 with tow package was rated at 5,680lbs (?) so I was a little over the rating.
We are shopping for a bigger cruiser for this summer and really want to go up to a 25 footer (classic two-footitis, for you fellow boaters that know what that is LOL). The dry weight of the model we are looking at is 5,100lbs. That means I'm probably looking at a 7,000lb+ haul...