When we stayed at Paradise Pier using our DVC points, they waived the parking fee. They said it was because DVC gets free parking.
This is from the Paradise Pier page...
Self-parking and valet parking are available to registered hotel Guests for an additional fee. The cost for self-parking is $17.00 per night, per vehicle; valet parking is $25.00 per night, per vehicle. Please note that prices are subject to change without notice.
So they do charge for parking for registered guests, but ours was free with DVC.