I've never towed with a minivan, but I have towed with a FWD car, a '97 Dodge Stratus. Towed a small flatbed utility trailer when I moved and my truck was down with a burned-out fuel pump. The car with a four cylinder did it fairly well, considering how loaded down both the car and the trailer were.
I wouldn't be overly concerned if the towing is not a daily thing.
I wouldn't be overly concerned if the towing is not a daily thing.