Complex sentence: After Don pulls Megan away for an impromptu trip to a Howard Johnson's hotel in upstate New York, Peggy has to pitch to the Heinz executives without them and unsuccessfully tries to sell the Heinz executives on her concept.
Split into simpler sentences: After Don pulls Megan away for an impromptu trip to a Howard Johnson's hotel in far northern New York, Peggy has to pitch to the Heinz executives without them. Peggy unsuccessfully tries to sell the Heinz executives on her concept.