Further up, Service Creek has camping and lot of area to fish all along the road to Spray. Clarno is alright for a couple hours by the bridge. There is other access around Clarno but to know what is public and what is not is somewhat hard to distinguish. I never fish at Twickingham, but again there is access. There are also a few drive in BLM sites along the river, just bring your own toilet.
Look to the positive!