EDITOR'S NOTE _ Back in 1964, a man running for the White House could still bring his campaign to the people without a vast apparatus of hired image-shapers, consultants, security forces _ anxious glances at the latest quickie polls to tell him what to say. Perhaps one of the last candidates to present himself largely unencumbered was Barry Goldwater of Arizona. An AP reporter who covered this and many another run for the White House recalls how it felt in simpler times.