The section of hwy 1 north of Ft. Bragg is one of my favorite parts of the entire West Coast of the US, but when it turns inland toward Leggett, it's a long and very windy road back to 101. Hwy 20 from Ft. Bragg to Willits is long and windy too, so if you are in Ft. Bragg, there are no quick ways to get over to 101. If you do stay on Hwy 1, notice how dramatically the geology changes right when you turn inland... to the South there are marine terraces ( old sea floor ) but to the north the coastal mountains drop straight into the sea, forcing the highway to go inland. August can have foggy mornings and windy afternoons.
If you are going to take Hwy 199 from Crescent City to Grants Pass on the way to Crater Lake, then you will pass through a wonderful old growth redwood forest. You'll go through a part of Jed Smith state park on Hwy 199, and the road follows the Smith River, which is one of the last wild rivers in California ( no dams ). Just past Hiouchi, there is a bridge over the river... on the other side of the river you can turn left on the South Fork road ( only if you want to see where I like to fish! ), but what you should do is turn right on Douglas Park Rd and drive slowly through a few miles of gorgeous old growth redwood forest. If you keep going, eventually you'll come out on Hwy 1 South of Crescent city... but you probably don't need to do that. Just go out for 5 or 6 miles and turn around and go back to Hwy 199. The prettiest parts of Jed Smith park are on that South Side of the Smith River. California and Oregon have had different histories of logging in this area, and it is somewhat shocking when you go over Collier Pass, leaving the thick forest on the California side and into a more barren Oregon side.
Have a great trip!