To the OP:
I think a minivan is a great choice for your trailer, however (and it hurts me to say this) the Grand Caravan would not be my first choice. If there is a reason people have a negative opinion about towing with minivans, it is because the Chrysler minivans have historically been the most popular and least reliable tow vehicles used. I love Chryslers, and owned many. But in the minivan market you are far better served by a Toyota Sienna or Nissan minivan. If you are buying used, the best choice would be to find an 07 or 08 Freestar with the 4.2 liter engine and tow package. You won't regret it.
-Jim
Not to hijack the thread, Caddy, but have you heard anything regarding the Quest as a tow vehicle? A bit concerned as it has a CVT. Agree with you regarding the Freestar, looking for replacement for my 2005. How about Kia Sedona? Thanks.