Parking on a Monday Evening

[Metalliman98]

I'm flying into LA (SNA) for work on the late afternoon of 10/26, planning to swing by DLR before heading to my final destination in northern LA area. I have never parked in any lots at the DLR before, we've always stayed onsite or within walking distance. I do have a premium pass so parking cost is covered, but I've heard that the main structure can fill up quickly. Would that hold true for a Monday evening without a MHP? Should I try to use the main structure or should I go directly to Toy Story/Puumbaa?