A date for filming- Performance

So far I have set a date for my filming to take place. I have chosen to film my footage the weekend beginning 14th November. I have discussed this with my cast and 2 out of 3 have committed to that date to be available for the entire weekend so that If anything goes wrong or I need to redo or film any extra footage then I have that time frame dedicated to that. The third actor has told me he should most likely be available for this date but is going to have to clarify with me this week due to work commitments. He said that he will most likely be able to film on one of the day of that weekend, which I think will be fine as long as he is available for a whole day. Due to the fact that there is the slightest chance he may be unavailable, I will prepare another backup date and as well attempt to find someone to be an understudy, which I will find this week in preparation.