First Trip Through US in Washington and OREGON

Yosemite and Sequoia National Parks are excellent. Campgrounds in Yosemite Valley will be full, but you can keep checking recreation.gov for cancellations. For waterslides, there are some good water parks near Los Angeles, and a nice one in Paso Robles called the Ravine waterpark. We just got back from a two week trip through Washington and Oregon, and went to the Wings and Waves waterpark in McMinnville OR. Very cool waterpark with slides coming out of a 747 on the roof. Fun!!

The redwoods are wonderful, and huge trees. The only place like it would be Sequoia NP and nearby Yosemite has a 30' diameter tree.

To reach the Grizzly Giant, you take highway 41 from Fresno to the south entrance, then to the right as you enter Yosemite, go 2 miles to the parking lot. http://en.wikipedia.org/wiki/Grizzly_Giant

I would also recommend the Avenue of the Giants, along highway 101 in northern California, along the coast. Many large trees.

I grew up in Grants Pass, and loved to take the jet boat ride down the river. It goes through Hellgate Canyon. Hellgate.com They also have a dinner ride and dine cruise. Nearby is Schroder Park, where you can find 30 amp hookups in a small county run RV park along the Rouge River.

Crater Lake?

There are many great places to camp in Washington too. Millerslyvania is not to far off highway 5, but seems worlds away. Huge trees and a good sized grass field.

Good luck!

Fred.

Welcome to the Forum...
If you want beaches then the Washington-Oregon Coast is unsurpassed. Take Hwy 101 all the way. Can't advise on water slides.

But, August is a REALLY tough ticket without reservations. We really like any and all of the first rate State Parks....but, again, August-good luck.

101 north to south from Astoria to Eureka.
US97 thru Oregon. Willowa mountains of eastern Oregon. That should eat up several weeks