If the animals are heading out of the inlet, stay well behind them. Never cut off their line of travel. Kayaks and nonmotorized craft should move and tie up together in a similar fashion. Anyone with a hydrophone can turn it up so other boaters can hear the whales' vocalizations. Leave pets home.
Dogs seem to get rattled by the presence of whales, and their barking destroys the serenity.
It is a federal crime to harass whales, which means disrupting their normal actions.