I doubt your reservation falls under the new restrictions made by Wyndham regarding guests. You are checking out the day the restriction starts. So it shouldn't apply. When you reserved through KOALA, the reservation you booked would have provided with the cancellation policy of the owner that listed it. You can check this now by logging into their website, going to the Dashboard (click on your picture/profile in the upper right), then click on My Trips. Your trip will be listed and you can then click on the three dots in the bottom right of the trip and select "View Details". The cancellation policy is stated and if you hover over the ? it will provide details of what the cancellation policy means.
Redweek is a trusted site, but depending on how the owner listed you may have to work directly with the owner and not through a verified listing or even Redweek full service. Verified listing means that Redweek has validated the details of the listing and Full Service indicates you work directly with Redweek and they hold payment until after you check in. If it isn't Full Service, then how trusted Redweek is means nothing, you are relying on the individual owner. Many people rent through Redweek all the time and have a great experience.
The thing with renting through sources other than direct from Wyndham is when you rent, you stop looking for prices. You are getting a cheaper price because there are more restrictive cancellation policies.
