Keep the blue lines in mind, but also be aware that if the handicapped parking is full, you will be routed somewhere else to park. We ran into that situation several times last March and also in October. Several times we saw people following the blue lines to parking areas that were closed because they were full. When the regular handicapped lot is full, the CMs will direct you to an alternate place.
So, have your handicapped parking permit visible, watch for the CMs in the parking lot (make sue they saw your parking permit) and be ready to go where they direct you.