BETHEL, N.Y. — Beverly “Cookie” Grant hitchhiked to the Woodstock music festival in 1969 without a ticket and slept on straw. The Bethel Woods Center for the Arts, the not-for-profit organization that runs the site, rolled out the tie-dyed carpet for Grant and Shelburne to promote its new glamping facilities and to delve deeper into Shelburne’s trove of photos from …