In the Crescent City area, I can recommend either of 2 state parks (no hookups). Just South of Crescent City is Del Norte Coast Redwoods SP. It is located about 2.5 miles east of US 101, and is in a very quiet setting, too.
Jedediah Smith Redwoods SP, about 6 miles east of Crescent City on US 199. Very quiet, shady and along the Smith River.
There is a private RV park just east of Jedediah Smith Redwoods state park, Hiouchi RV Resort. It looks nice, we've just never used it. Last year's rates: $24.50 to $26.50, TL RATING: Park: 7, Restrooms: 9.5, Visual: 8, email@example.com
There is a KOA 1 mile north the intersection of 199 and US 101, notth of Crescent City.
In the Gold Beach area I can recommend Four Seasons RV Resort. We stayed there the summer of 2005. They are about 7 miles inland from the coast, and don't have the fog or wind that can be part of the Oregon coastal parks. Last year's rates: $25 to $36, TL RATING: Park: 6.5, Restrooms: 9, Visual: 9. Contact at firstname.lastname@example.org
, (800) 248-4503.
Plan to stay at least 1 day in Gold Beach and take a trip on Jerry's Rogue River Jet Boat, Adult Fee: $39 to $79, email@example.com
, (800) 451-3645. The Rogue River Mail Boat is available, also, but not nearly as informative or fun as Jerry's.
I suggest you stay outside of the LA area. If you take I-5, Valencia Travel Village is just 1 mile west of the highway, but expensive ($40-$50 last year).
If you are coming in on I-10 from AZ, I suggest you stop in the Redlands - Loma Linda area before you hit the LA traffic. Try Mission RV Park at the junction of I-10 and California St. exit. Last year's rates: $28, TL RATING: Park: 6, Restrooms: 9, Visual: 8; (909) 796-7570.
I hope this information helps to make your trip enjoyable.