Re: raleigh airport
Sawwood,
RDU airport consists of two terminals seperated by an elevated parking garage and and roof top parking on a second parking garage and parking below that. You can pre pay your parking toll prior to exiting the airport by using any of the pre paid parking toll machines in the lobbies of the terminals. I always park on the roof of the parking garage between the terminals (which is also the main level of the larger terminal; or second level of smaller terminal). You can also pay your parking upon exiting the airport if you desire.
How are you making your approach to the airport???
Notice you are from Mass. My sister still lives in West Quincy and I originally hail from NH.
V/R
Jeff