Oh, I remember all sorts of useless information. Now, the important bits are often more difficult to retrieve....
Yes, I remember that Trigger was stuffed and was featured in the Roy Rogers Museum, which, unfortunately was forced to close in recent years, due to lack of traffic. Don’t remember what happened to Buttermilk.
Museum Contents were sold at auction. Including trigger buttercup and bullet
https://medium.com/@grahamwrites/another-vanished-roadside-attraction-96a5123e2609