Requests for modern conveniences such as electricity and cell phone service in NPS campgrounds are growing, and in many ways a vacation in a modern RV, or a park hotel, isn't vastly different from a week at home. A recent study, however, found that an old-fashioned camping trip that skips any use of artificial light—including even flashlights and personal electronic devices—can reset the participant's "body clocks" back to a normal rhythm.