If doing Solillicum Peak. recommend to park at the big "U". Road is only driveable by 4WD after that. Not many turnaround points until the very end...and at the end you are past the Solillicum Peak trail.
Driveable to the large "U" with 2wd (~800m from East Harrison FSR), most vehicles should make it here and there's space to park. After this the spur to Slollicum trailhead (~600m) is narrow, rocky and steep with some decent waterbars. Note that for Slollicum access CB1100 has been fixed and regraded for upcoming logging (but is presumably gated somewhere) so if you have a bike you may want to investigate going that way rather than hiking via this road.