I'm flying into the main terminal but flying out on Southwest at MSP. Never been over to the Humphrey Terminal there....is there a second rental car area over there or do you have to return cars to the main terminal and make your way over to the Humphrey terminal? I've never paid attention to whether the train that takes you over to the rental car area continues on to the Humphrey terminal...does it? Or do I just return my car to Humphrey if there's a second rental car area at MSP?