Saturday, Aug. 6, 7-8 p.m. EDT, on the Disney Channel (repeated Aug. 12, 16, 20, 28, and Sept. 3, 8, 13, 28): "Ollie Hopnoodle's Haven of Bliss." Old-fashioned cornball humor is almost a lost art in this age of sophisticated drollery. But humorist Jean Shepherd is one of the better surviving practitioners, as seen in this tale of an ill-starred family vacation starring James B. Sikking ("Hill Street Blues") and Jerry O'Connell ("Stand By Me").