First of all, I was getting a little crazy because the Alamo home page continues to list last minute deals available only through 11/2. Today I finally got smart and clicked on the link anyway, and sure enough, they're good through 11/10. I'm currently holding a reservation for a Sienna (8pax) through Alamo for $526 and a Caravan (7pax) through National for $430, so I canceled the Sienna. But thanks to the last minute deal link, I was able to get the Caravan through Alamo for $320!! 
And even better - because it's a last minute deal, it doesn't allow coupons, and since I don't have a coupon, I can check-in online and not even go to the kiosk!
Guess I need to go cancel the National reservation now...

And even better - because it's a last minute deal, it doesn't allow coupons, and since I don't have a coupon, I can check-in online and not even go to the kiosk!

Guess I need to go cancel the National reservation now...