Thanks to all. As Kathy Z said, her PM did allow me to find a ressie for our last day. Not my first choice of times, but, hey - beggars can't be choosers. I'd tried the day our 90 day window opened. The on-line system wasn't working for the "+10" feature (several people were posting with issues). So I called and I think I just got a bad CM not really willing to search. She kept asking me specifically which day and what time and I kept saying I didn't care - ANY day or time would do.
Anyway, when I called back after I got Kathy's PM, I was able to get in.
Now that my trip is getting closer (finally!) I'll have to make sure I find more time to spend on the DIS.
Lisa