Don't know how particular you are about car rental companys, but just wanted to let you know that there's a Dollar Rent-A-Car in the lobby of the Anaheim Plaza.
We're renting a 12-passenger van from them and they are willing to pick us up at the BWPPI, but since they're located on the corner of of Harbor & Disney Way, my husband is just going to walk there to pick up and drop off our van.