I had not seen any POR hidden deals so far, but that doesn't mean there weren't any.
When I look for this one on my desktop using both of your dates it did not show up for me - but that's just Priceline being Priceline.
When I just look for the 1-night it does appear - but there's no matching resort for it when I use the Guest rating sort.
The fact that it is not showing any ratings etc does make it strongly seem to be a Disney resort, but can't say definitively - although I do agree it seems super POR-like. and would be a terrific price!
When I search that date in my phone app I get a non-hidden POR for $221 and a POFQ - but no hidden deal!
These are all the 3.5* resorts in DS:
Looking at all of the results, I see each of those non-Disney resorts listed and they do not line up with the hidden deal, so that tells me that it is very, very unlikely to be one of them. (I'll never say never, but really, very close to zero. Would only be them if PL is having an insane moment.)
Also almost zero chance it would ever be OKW, because that is just too rare, haven't seen one hidden in quite a few years.
So, if I had to, I'd bet all my churros it is either POR or a bit less likely POFQ.
Also trying to figure out if this is disney port orleans. it has a garden view room available for these dates and prices kind of matches up
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