I really appreciate the responses with helpful information (like the posting of Hilton’s walk policy).

Re: other comments:

I didn't reach Diamond status by “not traveling a lot”. I also have lifetime
Gold status at Marriott and multiple other hotel loyalty programs that I use. I’ve been an AA Explat for a decade.

The rest of the the story is that I made the reservation through Hilton's central reservation line, and the reservation was not even made until close to midnight just after my flight was canceled. I went directly to the hotel after making the reservation.

Again, thanks to those with helpful comments.