Thanks so far guys.
I still do have the map you sent me Ken, in addition to another. Having never been there, I can't really envision what type of ride it is or how long it would take me.
But from what I'm looking at (biking South):
*Leave the car somewhere at Mattole (Any suggestions?) then ride Lighthouse Road to Mattole Road to Honeydew.
*From Honeydew it's Wilder Ridge Road to Briceland-Thorn Road to Thorn Junction.
*From Thorn Junction it looks like I could take Shelter Cove Road to Chemise Mtn. Road, which then apparently turns into Usal Road (unpaved) which will get me to Usal Camp and the southern terminus of the hike.
One map says Usal Road is unpaved and impassable in winter, but that map is cut off just below Four Corners. My other map simply shows it as a road. I'm guessing it's all unpaved.
So anyway, it looks like I'd ride an MTB if I decided to do this; it's just hard to get a feel for how much elevation loss gain I'd be doing.
As for a safe place to lock a bike for a few days, that's another reason why I'm asking.
It looks like Usal is far less developed; meaning either a better place to stash and lock, or a better place for someone to hack my bike apart unnoticed.
Any chance I'd be better off locking it at the Mattole side and reversing the direction my trip?
If all of this seems like needless craziness, keep in mind I'm simply trying to do more trips in which I'm using more human power and relying less on car shuttles. I like the idea of skipping shuttles and being self-sufficient, mixing cycling with backpacking...but where to safely leave the bike is always an issue.
If incorporating the cycling doesn't pan out, I'll look into a shuttle or just yo-yo the trail. A fast-paced yo-yo doesn't sound bad as there seem to be a lot of cool places to sleep out there and it would give me more time to see them.
Thanks again for any input folks.