since NW doesn't fly transcons, I haven't had any experience with this before.

I'm on the overnight SEA-EWR on Aug 11, and according to seatmap.com only 2 of 12 seats are gone so far...yet itn is showing F0 of course. What are peoples experiences with these overnight transcons? Do they frequently fill up with Y fares at the last minute, or do platinums stand a decent chance?