Planning Trip to Columbia River in OR/WA

I would recommend crossing the Bridge of the Gods at Cascade Locks. The bridge itself is a sight. There is an interpretive center at Scamania and check out the fish viewing at Bonneville Dam. Don't miss Beacon Rock also on the Washington side. Caution, there are a number of arched tunnels on highway 14. You will be fine height wise if you hug the center line. Check out the marks on the tunnels of rigs that didn't clear.

I've never been there but I hear there is a nice aviation museum in Hood River.