If you like to fish Paulina Lake is great, it's near Bend. There are some nice campgrounds there, many right on the lake. The area is beautiful and part of the Newberry Crater National Monument. We really enjoyed the hike around the Big Obsidian Flow, this area is different from any we have ever visited. If you plan on hiking around the lake, take mosquito repellent!
Have you ever been to Mt. Lassen? Lots of beautiful areas around there, great hikes, Juniper Lake, the Boiling Lakes, Devil's Kitchen, Bumpass Hell to name a few. Lake Almanor is nearby and has great beaches, boat rentals, and warm water for swimming.
We also enjoyed visiting the Lava Tubes National Monument. Crater Lake is also spectacular.
I wish we could have visited the John Day Fossil Beds National Monument, but we didn't have time.
The Columbia Gorge is cool too...along with a lot of other places in OR, Silver Falls, Multnomah Falls, the Bonnevile Fish Hatchery, OR is so beautiful.
