I checked minivans for my week, Apr 10 - 18 and they are expensive - at minimum 600.00. I'm glad I reserved an SUV through National months ago - 287.00 total with entertainment rate coupon. Also, other cars, even compacts, are not much cheaper.
I was thinking of changing to a Minivan but not at those prices - and I tried several different rental agencies as well. If I change my date to Apr 11- 18, the rate goes down by half. So, in the end I'll take the 287.00 from National.
I suspect Apr 10 being the day before Easter, many people have yet to leave and many people are arriving. Looks like it will be one busy day.