Aubie - I hear you on the parking. Some airports just don't have the parking capacity for holiday crowds and some like RDU don't have any capacity period!
Have you considered off airport parking? Every airport has a few. Most will valet park your car, some will wash, detail, service etc. and often for less than the daily rate of on airport parking.
I turned my neighbor on to it and he couldn't believe the comfort and convenience he was missing out on - even as a last minute flyer - like me.
Jim