Are you staying On-site? TL closes at 5PM so getting from there to your resort and them back to the MK should not be difficult using the bus system. If you are staying off-site as long as you plan to shower and change into clothes for the evening, I can't see how you couldn't get there in 3 hours. I would not leave my car at TL after closing since your options of getting back there several hours after closing are limited.