We have stayed at KOA Kampin Kabins a couple of times. The photo here is one in Cascade Locks Oregon. They are a little less money than a hotel room and a different environment.
We drove west from Cascade Locks about 25 miles to Horsetail falls and Multnomah falls. These falls are just above the Columbia river on the Oregon side. The Multnomah falls are actually an upper and lower falls with a combined height of about 620 feet. The area around the falls is heavily wooded and very steep.
The first mountain photo is Mt. Ranier in Washington which at 14,411 feet is the tallest mountain in Washington. We stopped for lunch and when we looked to the north we saw it in the distance. This is the closest that we got to it on this trip.
The second mountain picture is of Mt. Hood. We traveled around it from the north side to the southwest side and were quite close to it on a couple of occasions. At 11,239 feet, Mt. Hood is the tallest mountain in Oregon.