Take note of what CA Traveler mentioned about the Oregon pull-offs. If traveling northbound it's easier and safer to park the RV and take the towed vehicle siteseeing. Plan to make about 4-5 stops for a few nights along Oregon so you can enjoy every inch of it. It's an awesome coastline! It's very difficult to exit and enter the pull-offs while traveling north. It's easier to do traveling southbound.
Hope you're not planning that trip now. If you're retired or have a flexible schedule, May/June or Sept/Oct are perfect months. We've done it both and lucked out on excellent weather.