"Re-dialing until I got the voice mail message saying all lines are busy, then hitting zero and having the operator put me on hold for reservations is how I got my room booked."
Thanks for the tip. That's what just worked for me and I'm booked.
I did ask the woman taking my reservation why the group code is invalid for online registering and she told me that those are only good for calling in and that they aren't taking any reservations online this year. How was THAT missed in the registration instructions???
See you all there!