The Unofficial Guidebook has a section where it lists the times it takes to drive from park to park and from resort to parks and I believe from resort to resort. You can get this book at your library.
We drove to all the resorts one day last January and had a blast visiting them
all and seeing how beautiful they were and all they had to offer. I didn't time
all of them, but we drove from OKW to CR for dinner one evening and it only
took 5 minutes. We alotted a half an hour! Driving is so much faster.