Bill, I have meant to stop in Wishram, they are supposed to have an old steamer on display there, but every time I get along the stretch before The Dalles, I don't have the time to drop down the grade and check it out. It is on my list of to do before punch out.
I haven't stopped in Pasco in a long time, there used to be an SP&S switcher steamer in the park on 4th Avenue across from the court house when I was a kid there. So much has changed it probably is long gone, my old JR High is now city hall and the terminal for Amtrak is in the bad part of town.
Ron