Basically camping is allowed anywhere that’s not posted and isn’t interfering with logging or the Corridor work.
In the West Forks/Caratunk area some logging roads that *should* be passable at the time (if nobody is logging along them they may not be plowed) and have suitable spots for camping are Boise Rd (off Lake Moxie Rd in West Forks), Lower Enchanted Rd (W side of Rte 201 leaving W Forks) and any of its side roads, Enchanted Mountain Rd (W side of 201, about 6 miles from Lower Enchanted) and any of its side roads, and Hardscrabble Rd (aka Spencer Rd, W side of 201 about 3 miles past Enchanted Mtn Rd) and any of its side roads. (The Coburn Mtn trail is a few hundred yards to the right at the T at the end of Enchanted Mtn Rd.)
Both Lower Enchanted and Hardscrabble go a long way into the middle of nowhere, have many side roads and branches that get very confusing, and have nonexistent cell coverage after a mile or 2, so either download the maps ahead of time or use an actual GPS.
If you have the time I recommend checking out the
Spencer Lake POW camp memorial (mile 12 Hardscrabble Rd) and the
1963 Elephant Mtn B52 crash site a few miles outside Greenville heading toward Lily Bay. There are signs for both.