When you say drive to the park, would you be parking in the city walk garage?
Save that expense and keep the car at Cbay.
You can check out of the hotel and leave your car in their lot until midnight without any extra charges.
If you do not want to load the car with your luggage when you check out, use the bell service and store your belongings at the hotel.
Pick it up when after you leave the park and pick your stuff up at the hotel
Then pack the car up.