The only reasons I will hold onto a reservation that I might change/cancel:
1.) My first example: I have and ADR fro CRT dinner in mid Dec, but have heard some negative things about it and have considered changing to Narcosse's. With that said, I do not know if I really want to change so I am keeping my ADR at CRT bc if I decide not to change to Narcosse, then I will still go to CRT for dinner. But I do not want to cancel it and then decide a few days later I do want to go and not be able to get an ADR...so I am waiting til I decide for sure. Now with that said, when I say I am waiting, I mean I am deciding within in the next few days which I would rather go to and I am not traveling until Dec., so that gives plenty of time for someone else to take that spot.
2.) A similar situation I have a regular ADR for Le Cellier and I definitely want to go to that restaurant. However, when I booked it I decided against the CP package. Now that I have added another night to my stay, I am reconsidering the package, but cannot decide if I want to do it with Le Cellier or keep my regular ADR for Le Cellier and do the CP at another restaurant like San Angel Inn another night, which will most likely be my choice. So I am not going to cancel my ADR to Le Cellier bc there is really only a 10% chance I will want to go with the CP package at Le Cellier instead of somewhere else another night.
Just a side note: with the two circumstances I mentioned above, I was certain of what I wanted at the time I was making the reservations. I didn't just pick wants that I might want to do and will decide when I get there like some people due. With these two ADR's I mentioned I now I have a few doubts on, but it doesn't mean I won't go bc those doubts will probably pass me by. But if I do end up canceling either one, it will be months ahead of time. I will not be a no show and as far as:
3.) Last minute cancellations: I will only do this if I am sick or really really really cannot make due to unforseen circumstances. Last time I was in Disney I had to cancel my chef mickey character breakfast the morning of our last day bc I developed a cold overnight and would not have enjoyed it. (but at least I got sick on my last day and not my first but it was a bad plane ride home). I set my alarm for early morning when Disney dining opened to see how I felt but alas still sick
so I did call an hour or 2 prior to my ADR and canceled. The rep was appreciative that I actually clld to cancel bc she most people would not. It was a sad sad phone call for me that day, but I happy to say I am going back this December and will go there for the first time finally!
Also I would never ever make a multiple ADR's for the same day/time at different restaurants or multiple ADR's for the same restaurant on different days...that is just a big no no to me