Yes, I've been seeing this happen and have a single night right now, so it's going to be having the search set up on my phone and random refreshes throughout the day.
This morning was my preferred "day of" and I thought I had snagged it, then the got the error message. Totally recognize that I'm in the group that is trying to take advantage of the lowest points season, and it will make competition tough. This is also looking to be after the refurbs on BWV are done, and 9 points a night for a newly redone room is only going to make booking harder.
Ultimately, I have a second contract at OKW, so I can absolutely get a stay booked sometime in May. I'm just an Epcot/HS girl, so Crescent lake really is where I'd love to be. Send any booking pixie dust you can spare!