That's an awful big load for a little bitty minivan.  Sounds like DRW diesel territory to me.  Next time you do something sketchy and dangerous like that, I wish you would post a public service announcement warning all the unsuspecting motorists of your intentions.  That way, we wouldn't be on the roads at the same time you are doing your stunts.  ;)
Congrats on the new purchase.  Heated mattress?  Seriously!?  That sounds nice for those cool spring/fall nights.
I had a Dodge Caravan around 10 years ago as a company vehicle.  3 years, around 70,000 trouble free miles.  I never used it as a tow vehicle, but it was likely one of the most functional vehicles that I have ever had.
Have fun in your future travels.