Sandy Riverfront RV Resort Troutdale,OR is a decent full hookup park. Troutdale is at the mouth of the gorge. A short drive to all of the water falls on the Oregon side. I would suggest you plan to drive up the Oregon side on old hwy30 as far as you can go. Drop onto I84 for the short drive to Hood River, cross the bridge and back on Hwy14 in WA. Crossing back on the I205 bridge to I84 and Troutdale. That is a nice one day loop. But if you don't mind hiking a bit you could spend a couple days hiking the trails in the gorge around the water falls. Be aware, May is still wet season here, so be prepared for rain. Also stop at Bonneville Dan and the fish ladder. There is also a fish hatchery near by that might be worth a visit.
