I have aranged with SBP AVIS to do that for me. I "rent" from the Embassy Suites in town, and since they share cars with the airport I just pick up my car at the airport when I arrive. Not only do I not get hit will all the fees, the rental is usually 10-15 dollars less per day. So my total for a 3 day weekend rental is only about $75 instead of $160.