I understand the situation with your Caravan. I was driving a 1995 Dodge Neon, which I purchased brand new, until January. I was hoping it would hang in there until my smart was delivered. Well, it didn't make it. Died of motor failure in mid January and I was forced to buy a stop gap car until my smart was available. I took delivery on July 12th and now I have two cars temporarily.
People who haven't studied the smart decide it is dangerous just by looking at it. It actually gets among the highest crash test results, has Electronic Stability Control, ABS, for air bags and a crash cage (Tridion Cell). It won't make you invulnerable. But, to classify it as 'dangerous' is just wrong. As far as mileage is concerned ... it is not astronomical. smart claims 33 City/41 highway. Those figures reflect my experience almost exactly, a lot of people claim they get better. But, even 33 in town isn't too shabby.
Here's hoping your Caravan makes it.