Although the trailhead signs are all painted over or removed the entire route is rather clearly marked. I saw only signs indicating "no public access" but nothing said no trespassing. Stick to the well marked trail and you can easily back Decalibron.
Supposedly by the end of the year this issue will be resolved by the end of this year (08')
I hiked up Mount Democrat in August 2016. The road is open all the way to the trail head and the Kite Lake campground. You'll need a vehicle with high clearance (not necessarily 4WD) to get all the way to the trail head. Sedans and other low clearance vehicles were parking about two miles down below a deteriorated section of road. There's a self-pay box at the trail head. $3 for day use; $12 for overnight camping. Trail to Democrat was well-marked and in good shape. Fun hike!