sorry few more questions

Epcot is in 2 bits Future world and showcase, but Showcase operates later hours. Are they
actually the same park. If we go to Future world which closes approx 6pm, can we move onto
Showcase for the evening without having to go back to the car and park elsewhere.

Also and sorry to keep asking, we are staying in Crescent lakes, to get to these parks
do we have to go on I4 as they all give I4 as a route.

The parks we plan to visit are
Magic Kingdom
Epcot
MGM
Seaworld

The others we want to visit are outside Orlando, but not yet decided

Thanks
Chris