NOVATO – The '60s aren't dead. They're in an archaeological site north of San Francisco. An old commune where the Grateful Dead and other bands used to romp is being excavated and items catalogued by state park archaeologists at Olompali State Historic Park. Among the artifacts: the classic hippie beads, a marijuana "roach clip," fragments of tie-dyed clothes, and a reel-to-reel tape a Marin County studio technician has promised to try to restore. They are the stuff of memories for Noelle Olompali-Barton, who was 16 when she and her showbiz mom plunged into California's new counterculture, retreating to this once-private...