Saw a very nice drop tonight in Alamo rates for November using codes AD2338FDF (Saturday night stay required) and 7015309. I'm at $106 for the week with an economy car.
I used those codes through the Costco website and the rate went from over $430 to $200 for 11 days. Booked immediately and now it's up to $240. Love those Costco codes!
Thanks everyone for posting. I was having a problem getting a reasonable rate for our dates of Dec. 26 through late Dec. 30. Works out to a 5 day rental. Up until today rates for a mid size were over $300. Got on this morning with the costco codes and got a mid size for $143.56 total including all taxes and fees. I'll keep checking during the next month hoping for something even better, but rather happy with what we got.
Note of interest; I tried the code again with same dates and times a few minutes ago. The price went up $50 in just a half hour. The moral is to book it as soon as you find a good rate, waiting can be costly.