What better way to spend your patriotic holiday weekend than strolling around one of the Triangle's loveliest parks, listening to the strains of bluegrass, rock, pop and swing drift through the trees? Durham's B>Festival for the Eno$> (July 1, 2 and 4, 10 a.m. to 7 p.m. each day) brings an eclectic bunch to its 21st fundraiser for the purchase and protection of park lands in the Eno River Valley. Saturday's billing includes bluegrass legend Ralph Stanley (pictured) playing with Jim Lauderdale, Tift Merritt and the Carbines, Trailer Bride, Chuck Davis and the African American Dance Ensemble, Gerty and Carlota Santana's flamenco troupe. Sunday's schedule advertises the appearance of The Nields, who rocked last year despite 100-degree heat, Dar Williams, Hobex and Julee Glaub, and Tuesday will offer Two Dollar Pistols, a hot new six-piece band called the Timehoppers (which includes Red Clay Rambler Clay Buckner, former Zipper Jon Kempainnen and John Soady from the Kickbacks), blues greats John Dee Holeman and Fris Holloway, and Shark Quest. If this is not enough to lure you, a spoken-word stage will host a number of local writers, a children's stage (in the shade) boasts all-day entertainment, more than 100 local crafters will be hawking their wares, and canoe and raft rentals are available to give you the best seats in the house\m>on the cool waters of the Eno. Kids under 12 enter free. For adults, admission is $10 at the gate, but park first at the Durham County Memorial Stadium and ride a free, air-conditioned bus to the festival site.