Fitness on a Deadline

I have two months until we spend a week at Disney. I remember the last time I spent a week at Disney. It was exercise-intensive--and I was 20 years younger and only had one child with me. I am seriously considering the Couch-to-5K Running Plan.

What about you? Have you ever whipped yourself into shape by a certain deadline? My emphasis truly is on endurance and fitness so that I can keep up and enjoy our time in Florida. Any ideas?