the Orlando airport is very big and can sometimes be confusing. Tell your parents to make sure that they remember which side of the airport they park in...A or B sides. Both sides are identical and can cause someone to get easily confused. Funny story that my husband forgot what side he was in and called me to tell me that our car had been stolen. I calmly told him to go back into the airport and go out the other side.
My daughter lives in Dunedin and is just a couple of blocks away from the Rainbow's End. Make plans to be there a couple of hours and make sure to take time out to go into their little town and have lunch.