I think it is very high.
I went to the Fishing Flea Market in St Joseph's college in Patchogue today. Got there 30 minutes after it opened. Crazy long line, almost not moving and heard the place was full. So I left. Was surprised, did not expect that.
Earlier this year I went for the Caumsett State Park permit (limited amount they sell). Got there a few hours after they started selling them and there was at least a 2-3 hour wait, left that one too after 15 minutes. Thought after the initial long line the wait would be an hour most.
The only other show I went to this year was Striper Day, very long line, crowded show, had a good time (in line talking fishing was fun and the show was good (and JAMMED)).
I fished about 40 times in 2015, almost always from ~1:00 AM to ~8/10:00AM the latest, never a crowd, most times all alone.
Surprising how many others are out there NOW who are so into this sport.