Hi Carrie-Anne and welcome to the Mom's Panel,
You are going to have a fantastic time at Disney's Old Key West Resort. My family stayed there in 2009 and absolutely loved it!
The best way of getting from Disney's Old Key West Resort to the
Hoop-De-Doo Musical Revue using Disney's complimentary transportation would be to take a bus to the Magic Kingdom and then from there, catch a boat over to the Campsites at Disney's Fort Wilderness Resort.
I would recommend that you allow at least an hour and a quarter for the journey which includes for time spent waiting for your designated mode(s) of transport to arrive.
This particular Dinner Show can only currently be booked online through 16 October 2011. I would recommend that you continue to check availability online
HERE or call 001 (407) 939-3463 up to 180 days prior to your visit.
Wishing you a magical holiday!