Travelsheryl- thanks for the info. You basically answered my question- that if I use Priceline there is a chance that an offairport agency might be the company I get. I now have to weigh whether the likely price savings of $25/wk is worth it ($199/wk dollar confirmed reservation vs. a priceline price of $25/day) I understand that the priceline price may be more or less than $25/day but as $21/day has already been rejected the priceline price won't be much less than $25/day.
I also have a Hertz reservation for a full size at $148/wk with an upgrade coupon to a premium (Grand Marquis) that will hold all of us and our luggage. I am considering a minivan so I don't have to worry whether the upgrade will be available since we will not fit in the full size. For the last 4 years we did receive the upgrade, however, so I am sort of counting on it.
If anyone has any thoughts, comments, suggestions, or just wants to tell me I am nuts, I would appreciate hearing from you.