Sure valet the car, pay the 6.00. Or, pay nothing to park in the lot, because you are an onsite guest.
To the OP, there is a great big sign that says parking is not allowed for the parks. I am sure you did not know this.
As another poster suggested, park your car in the lot an monorail to the Contemp and then back to your car. Much easier, much cheaper and you won't chance having your car towed.