Just because you could not get PS for that night does not mean you cannot eat there. You can always walk up and ask to be seated. You may have a wait, and it may be a long wait.
I was told by a Cm that only a certain percentage of seats are reserved for PS. I want to say 10%. So, if those 10% are booked, you will be told there is no available PS. BUT, the rest of the restaurant is wide open for walk-in. It is just based on a first-come-first-serve basis. So you will have to wait.
Here is an example, we decided last minute to go to CM, I called around 3PM to see what they had for PS that night. They had nothing before 9PM. So, at 6:00 we headed out to CM, walked in around 6:30PM, gave our name and number in party to the hostess and we were seated before 7:30. Sure the heck beat making a PS to eat at 9PM with 3 small kids.
So, I would try going to LTT right at 6PM, that is when the park re-opens for
MVMCP, right? If you are one of the 1st ones in the door, you should get a seat fairly soon.