No disrespect,but I would get "All" the bugs worked out before i took a trip like that in that car. And even then,I still probably wouldn't take it.
For a more enjoyable trip,take the TC.
i would take the dart BUT...... before i did i would get some killer car insurence that has an unlimited towing package. lol. like they have said. i wouldnt take a car that hasn't been proven reliable on that long of a trip. I get nervous when i venture out over 25 miles in mine. lol