Not sure about your '97 T&C, but, I had a '96 Grand Caravan...couldn't tow it 4 down. To the best of my knowledge, none of the MOPAR minivans are towable 4 down. If you attempt it, be prepared to purchase a new transmission at your destination. In my '96 Caravan, Dodge recommended not to even use a dolly...don't know why if the front wheels were off the ground, the rears are "free wheeling", but, that was the manuals stand on it. The one time I had to have it towed, they asked me what type of vehicle it was and when I told them, they sent a roll-off truck as opposed to one of their tow trucks. AWD models were available at that time and maybe they just had a "one size fits all manual"... If you want to take it as a towed, you'll probably need a trailer to get the 4 wheels off the ground if you are going any distance.
My 2 cents, your mileage may vary...
Don
Bronwyn
Down to 1 kitty...J-Lo, the princess
2014 Thor Tuscany 40RX
2015 Jeep Cherokee TrailHawk Towed