Regarding Mills House in Charleston, Wyndham Hotels, not the timeshare, controlled that location. It listed was an "affiliate resort" in Club Wyndham.
At any rate, Wyndham Hotels lost control of the hotel, Hilton manages it now. I was never able to book there with Wyndham points, but I did see availability through the Wyndham Hotels Website but never stayed there.
This happened at sometime during the pandemic.
I just looked it up, and the change happened in
2022:
The hotel opened on October 9, 1970, managed by
Hyatt as
The Mills Hyatt House.
[14] The hotel left Hyatt in 1983 and joined the
Holiday Inn chain. It was marketed both with and without the chain name, sometimes as the
Holiday Inn Mills House Hotel and also as
The Mills House Hotel. The hotel's owner, the Bristol Hotel Company, was sold to FelCor Lodging Trust in 1998.
[15] The hotel left Holiday Inn after thirty years and joined the Wyndham chain on March 1, 2013 and was renamed
The Mills House Wyndham Grand Hotel.
[16] FelCor was sold to RLJ Lodging Trust, run by billionaire BET founder
Robert L. Johnson, in 2017.
[17] In October 2021, RLJ Lodging Trust selected Davidson Hospitality to assume management of the hotel.
[18] They extensively renovated the hotel, and moved it from Wyndham to Hilton's
Curio Collection brand
[19] on October 1, 2022,
[20] renaming it
Mills House Charleston, Curio Collection by Hilton.