I heartily agree that you shouldn't miss a leisurely exploration of Hwy 101, but would add that in mid-summer the parks fill up, especially on weekends since natives from the Willamette Valley hit the beaches. Sites big enough for our coaches and a toad can be harder to find.
During the times Lee and I like to RV the coast, spring and fall and the occasional winter, it's great because you can travel or stay put as your whims dictate; drive to any open State Park or private one and take your pick of ideal sites. But midsummer you're going to have to create and stick to an advance plan, and call weeks or more in advance to be sure of spots, depending on area. Some stretches further south are not quite as bad and offer less development and more scenery anyway. We favor Bandon and ports south, but Florence/Reedsport lakes and dunes and the great RV parks at Winchester Bay and Lakeside attract us regularly also. Don't miss time exploring the Rogue River via Jerry's Jetboats at the south end of the bridge in Gold Beach (pick the old hotel at Agness for lunch during your boat trip), and perhaps an overnight at the RV park at Agness.
Midcoast and north have more infrastructure to handle the larger visitor load, but it's just that Lee and I prefer more scenery than shopping opportunity. Our preferences shouldn't, however, influence you into missing Astoria's wonders, Tillamook, or any of the north coast.
Many of us who've toured Oregon often can offer suggestions before and as you travel, especially we native Beavers; but there are so many options, don't hesitate to ask as curiosity prescribes.
Joel
