Since no one has posted, I'll give you my humble opinion! We are going down for a wedding in Nov and are just able to spend one day in MK. Since the park has short hours we decided to get a PS at CRT for right at the close of the park...that way we can watch the sun set, the lights come on, and we get to walk out through a mostly empty Main Street and feel like we've extended our day! We also got a PS for Tony's breakfast, so we'll be getting into the park before opening. I guess it really depends on the hours of the park when you will be there.
Good luck!