Park in the lot for the upside down white house. I'm pretty sure they don't charge for parking there. It's right next to Mt. O and would be a 1 or 2 minute walk at most.
When I was at Mt. Olympus last week, the lapbar for the back seat of cyclops was missing. Upon further inspection I noticed that they didn't unbolt it and take it off, but it had actually broken and snapped off.
Best: Cyclops at Mt. Olympus - the last drop with the ejector air in the back seat is insane.
Worst: Dragon at Adventureland (Iowa) - those final corners cause you to slam your head into the seat and restraints giving you a headache.