INDIAN SUMMER: Seven people return to Camp Tamakwa at the invitation of the elderly director, where they spent a marvelous summer 20 years earlier. Stars Alan Arkin, Matt Craven, Diane Lane, Bill Paxton, Elizabeth Perkins, Kevin Pollak, Sam Raimi, Vincent Spano; HEARTBREAK HOTEL: A teen-ager kidnaps Elvis Presley at a 1972 concert and brings him home to meet his mother. Also stars Tuesday Weld, Charlie Schlatter, Angela Goethals