I don't know about Orlando airport. However, what we do is agree to meet at the baggage claim carousel for the incoming flight. You will have the number of the baggage claim carousel for your flight on your ticket, and will likely just follow other passengers on their way to that carousel. This is typically on the lower level of the airport with lots of overhead signs saying "Baggage Claim". Your family can park (they need to write down information about where they park their car -- usually color-coded plus parking level info) and make their way to the lower level. They can then start at one end and walk along the corridor looking for your flight number on the signs above the baggage claim carousels. When they find it, there will be a place for them to sit and wait.