I just came through there yesterday up the Nestucca and there is no sign that says "Bald Mt. Rd." - but it's the only paved road heading southward off the Nestucca Rd. from anywhere near the crest, so that must be it, i should think. Bible Creek is signed.
Oh, and the Nestucca River is eminently passable, despite the signs saying it's closed until Aug 28th. Just some culvert work, almost done, they'd probably even let you through if you came by on a workday.
Made for a great ride yesterday, with virtually no traffic.