Take the bus to MK, get off the bus, walk towards the MK entrance. Rather than go with the crowd and head left when you get to where the monorail runs overhead, you want to go right, with the bus driveway on your immediate right and the park on your left. This sidewalk will take you to the CR...about 8 min walk. Or, you can take the monorail if you prefer...get off the bus, follow the crowd to the left, but keep going straight when they all go right into the park..if you go straight you will go up the ramp to the monorail platform. It may take a bit for the next car to come, so it may not be as quick as walking.
Then, after you eat, walk back to the MK..the monorail from the CR to MK will take you about 20+ mins.