If you have 2 people who can split up, have one get the luggage and one get the car. Otherwise, get the luggage first. They have carts in baggage claim that you can use for $3 to help get your luggage over to the rental car. If you are familiar with MCO, you could pull the car around to baggage claim and pickup the others with the luggage. You can't wait at the curb though. If you're not familiar, I would just wait on level 1 by the car rental counter and meet up there.