Matthew, the portion of trail that crosses Hwy 9 is what ruined that trip for me a few years back
First, Castle Rock will not be closing anytime soon. It's in the same mode of operation like Coe now.
Second, Csstle Rock does offer nice scenery. You need to see more of it.
Third, the section of the Skyline To The Sea trail between Big Basin HQ to Hwy 1 is by and far the most scenic portiion
Thanks for sharing