my family and I stayed there last September and going again for a two week stay from 9/19 to 10/3.
Last year the lines were very manageable. We had a two week pass, so we weren't rushing at all. The parks got crowded over the two weekends we stayed there.
Last year Kong just opened, so the queue was at least 100 mins over our whole stay. Maybe that had some effect on the crowd levels for the other rides.
This year Volcano Bay might have some effects, wet n wild was half empty last September.
We booked a room at Cabana Bay, so no express passes for us. We might do it for a couple of days if we feel like we need it.
Hope you and your family have a wonderful time. Quick question: are you tilting more towards Universal?