Westport Country Playhouse from train station?

A friend and I are going up to Westport on Thursday night to see I Do, I Do! at the Westport Country Playhouse. We'll be taking the train up from Grand Central, but I'm not entirely sure how to get to the Playhouse from the station...the website says to take a taxi, but I was just wondering if anyone knew a. about how much this costs and b. whether I would have to call in advance to get a cab (both to and from the theater) or if there are cabs waiting outside the station/theater. Thanks so much in advance for your help! :)

I am going to see the show tonight but am coming in from Manhattan. I am worried about catching the last train back (which I think leaves at 10:46 pm). Has anyone had to do this after seeing the show and did you make the train? The box office says that the show runs 2 and a half hrs. In case I miss the train, does anyone know of a backup way for me to get back to Manhattan tonight? A bus or something?

Thanks, givesmevoice! I didn't think to check the next day's schedules. I'll use that as my backup in case I can't make the 10:46 one! Thanks so much!