There is an AVIS attached to the Radisson at the Port - they have an AVIS shuttle or you can take the Radisson shuttle over to the hotel (which ever comes first) and pick-up your rental car. It's works out very easy.
Both Avis and the Radisson shuttles are free. The only down side is you and 50 other people are going to be trying to get into the van that seats 8 at the same time. Be prepared to wait for the van and again at the rental counter. Make your ressie ahead of time to lessen your wait and if you have any special requests-like car seats-call the rental office directly to make sure they have your request. We needed 2 car seats and I called them several days ahead to make sure they had them available. When we got there, there were only 3 left-and 2 were reserved for us.
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