This is our 3rd trip to the Oregon Coast planned for this September, we reserved State park sites up and down the coast already last month. Some parks still had sites for September others had nothing.
Clackamas County has some nice parks south east of Portland that may be in driving distance of the Gorge if you do not want to stay in the Gorge area itself.
2008 Topaz F254SS 26 ft.
2009 Chevy Silverado, 2500HD, Duramax, Allison Tranny, 4x4, EC
250 watt solar panel system, BlueSky controller and remote