Greg,
RBManns route back is very good. Depending on time and interest the waterfalls on 84 east of Troutdale are extremely memorable----- be careful, some now require reservations. A parallel drive staying on the WA side of the Columbia out of Camas is hwy 14, also compelling: more 2-lane, less freeway. A stop at Beacon Rock, experience can't be duplicated, then Stevenson for fuel (car and stomach). Continue 14 east to cross at HR then up 35 to Timberline Lodge on Mt Hood. Can't be overstated, simply spectacular. The lodge provides views, meals, no reservations (unless staying over), pricy but once-in-a-lifetime. Back down 35, pause at the Best Western (or stay over), best river-view dining in HR. Back over the bridge to hwy 14, east to Lyle and follow RBManns route as above.
If your visit to HR overlaps, join our car group: (
www.gscg.info) for a drive or coffee. Options and details for several dates are on the gscg site, click Resources for a map: 2022 Local GSCG Loops. The Route #3 is RBMann's path south-side of Mt Adams.