Thanks mm121 for the photo. I decided not to take the RV on my trip so I did not get to see the RV lot in person, but I did find out a little more info:
-- I asked the parking gate attendant whether or not a preferred passholder had to pay additional monies if they wanted to park in the RV lot and was told no. Someone who has actually parked in the lot with an RV might want to confirm as the attendant info is not always correct.
-- I was told that the garage clearance is 8 feet, but when I got to the garage the signs said 7'8". Could be that it is actually 8' and they just keep the other 4" in reserve as a safety option, but I would suggest everyone stick to the 7'8" number when making their plans.