Finally! I was able to get both Alamo and National down to more reasonable rates for my trip, Oct. 22-27. Until today, the best I could find was $197 for a weekly rental with Alamo and $203 with National. I'm very happy to get both down by around $50.
Using the Alamo Insiders code 7014667 and $35 off coupon, I have a fullsize for $151. My National reservation for the EA is $150 using the Car & Driver contract ID 3715444 and a one-day free coupon.
The funny thing is, the inventory must be really tight with these codes. After I made both ressies, I kept playing around with different codes to try to find lower rates--you know, the "I can do better, I just know I can" syndrome--but only found one other comparable rate*. A couple hours later, I plugged in the same codes for the same dates and the rates were back over $220+! I'm glad I saved my reservations when I did.
I'll still check tomorrow for any Last-Minute Specials that might come up, but I'm pretty happy with both of these. I'll probably go with the National reservation since my last two MCO trips were with Alamo and I'm hoping for a good variety of vehicles on the EA. Good luck to any remaining late-October renters!
*I did get a rate of $141 all-in with National for the EA, but it was with a University-affiliated code. I'm not comfortable using those codes and a difference of $10 is not something I'm going to lose sleep over.