The same thing happened to me and hubby. We were staying at the Poly in late September 07. We did have ADR's made for our stay. We had a change of plans, and decided we would just like to stay at the resort on this particular evening and eat a Kona.
So...at a resort that we were paying almost $400.00 per night for, guest relations told us we could not eat at Kona as they were booked. They did suggest that we be there exactly at opening time (4:30pm I believe) and throw ourselves at their mercy.
Yes, this is what we did and we (it was just the 2 of us) were seated in about 1/2 hr.
It felt odd that we could not get a meal at "our resort". We were lucky as I stated and did eat at Kona.
It was no big deal either way. I am at a loss as to how the resort can handle this problem. Both sides are legitimate in my opinion. ADR's should be available to those that make them, but a resort guest should also be able to dine at their resort.
Pat