Road trip from ID to OR coast 7/4 - 7/10. What attractions along the way?

My wife, 7 yr old daughter and I will be traveling through Oregon on Hwy 26 to Eugene then to the coast.... then south along the coast then back east again near the California border, exact route to be determined on the fly, most likely.

My interests are anything permaculture, eco art, organic food co-ops, primitive technology and eastern philosophy. Are there any attractions or events along the way that we should visit? I'd be very keen to take a look at natural buildings and meet like-minded folks along the way too. We will be self-contained in our VW camper van so we don't need a "place" to stay... and we're not looking to be a nuisance to anyone .

Being that we'll be camping out of our van the entire time, what is the camping scene like along the coast? Are there many undeveloped free campgrounds any where close to the coast south of Eugene? How about inland a ways?

Any suggestions/info would be appreciated!

Thanks,
rusty

Here's one idea right on your route! 
https://permies.com/permaculture-forums/4345_0/cascadia/permaculture-at-the-oregon-country-fair

Random thoughts -

Newberry Crater... a massive billion ton obsidian flow - lots of day tourists.

If you have a boat - waldo lake in national park... so very very clear..

Crystal Crane hotsprings - north of steen's mountain.. odd ball side of the road place to float in a hot pool and look up at the night sky.

Get a BLM map... dispersed camping can be had just about anywhere as long as you don't mind a few empty beer bottles.

Lost Valley Center - south of eugene

Oregon dunes... beautify place for tracking

So much to see in just six days, about 6 hrs from Boise to Bend and another 4 hrs to the coast from Bend without meandering. You occasionaly see the wild horses outside of Burns.
Oregon Country Fair is an eclectic mix of anything you could imagine. It is at least a whole day to see it all. Be aware that there will be occasional above the waist nudity of some free spirits. You'll be going through Veneta anyway as you head for the coast.
Sister quilt show will be the weekend of the 10th heavy traffic through town so you'll miss that.
Once you get to Sisters there is a scenic route option that is only open during the summer months. Switchbacky road, we always use the 4th as the date to go that way to look for wild strawberries, but it has been a late summer. Proxy Falls is along that road small water fall that goes underground  at a pool at the base.
Newberry Crater is about 30 miles South of Bend off Hwy 97 I live at the base of the monument.
There are a few interesting sites in that area. Lava River Caves, Lava Lands Park and the High Desert Museum. Not sure of the schedule at the museum but they do have a working blacksmith, operating vintage sawmill, critters and such.
Lot's of mountain bike trails from easy to heavy crazy moguls.
Many lakes in that area with water so clear it's like floating on air. Hosmeier is my favorite a catch and release lake with land locked salmon, blueberries won't be out yet but later in the year they are all around the perimeter.
Waldo is off of Hwy 58 so you'd be making a detour off of your Hwy 26 route. Great lake to paddle in if you have a canoe.
Sounds like you'll be heading south on the coast I haven't spent much time on the southern end am more familiar with Pacific City area. Cranberry bogs around Coquille.
Coming back Diamond Lake, Crater Lake.
Klamath Falls and Lakeview use a bit of geothermal like Boise.
You could easily spend your whole trip anywhere along the way and stll not see everything.
I guess if it was me I'd hit the coast and then the fair if you don't get to see the ocean often and then leisurely head back.

you can camp for free off the side of the road in the state/national forest, but...don't get lost , and there are places that are rougher than others, so be aware.

ditto on the Oregon country Fair. If you can I'd plan a couple days there. You'd get a lot of great leads on local places to check out. It's not worth planning a trip to visit permie things and missing that!

I would def plan coming back through Crater Lake. Just north of CL is Collier Memorial State Park--it's a very nice quiet park, with a great trout stream running through, and also has a pioneer/logging museum(I think I remember it being free, it was all outdoors).  They have gathered homesteader cabins from across the state which are fascinating, and also there is nice kid friendly hiking. We stayed there when we visited CL, because it was cheaper, and the Nat Park CG just seemed so crowded and urban. We were there in August, and there was only one other camper there, an older couple who the guy was a rabid angler and he said the place was a secret of anglers. Yum, trout!

Ack! I see the end is 7/10, that's the weekend of the Oregon Country Fair. You may have to hit that on the way back home, I would def make that a have to go to event! Don't plan too much, 6 days seems short to me to do justice to all where you want to go.

Thanks for the suggestions and info, everyone. The fair sounds great but we'll likely be well on our way home by then. Maybe not. We'll see...

Thanks again.

OR Dunes is really incredible.  You could camp at Eel Creek and hike across the dunes to the ocean.  Parts of it are like being on another planet. 

Here are some photos I had the opportunity to take while out there:

http://picasaweb.google.com/Alwaystracking/OregonDunes#