I got a chance to get up to Ridgefield National Widlife Refuge to the reconstructed Cathlapotle Plankhouse. The Chinookan style plankhouse is based on what Lewis and Clark would have seen when they visited the Cathlapotle village. Lewis and Clark noted the village had 14 ceder plankhouses. The building is 37 feet by 78 feet and normally during the summer is open to visitors on the second Sunday of the month.
I continue to try and track down what there might be to see in the area related to the original inhabitants. We did a very good job of wiping out all traces of the native population.