Actually, you pass through Immigration after you deplane your international flight, then pick up your luggage and pass through Customs. Then, assuming intend to take puddle jumper from the International, you would make a left into the terminal to get your puddle jumper ticket, and recheck your bags with them. Once you've done that, then pass through security to wait for your Tropic/Maya plane to the island. *Or*, should the 4 of you choose to go to Municipal, you'd turn right after Customs, to the outside of the terminal and catch your taxi there.