The boom will surprise you if you are not expecting it, and the onlookers were quite a way from the touchdown. Guess nobody briefed the dogs, heh heh.
My grand daughters got to see one of the return to the Cape landings and the boom was well ahead of the landing. Anyone near Cocoa Beach should drive up to the Port Canaveral viewing site by the "Love Boat" docks and the new parking area. It can't be more than a mile from the landing zone that Falcon uses. There's also a park and several eateries on the canal, but they are usually packed solid.
Next Saturday will be first lurch of the new cargo Dragon, and will be coverred by NASA and the normal stuff on "spaceflightnow.com" around 1100 and on EST in the U.S. Normal trajectory is to northeast, so all the way to Jacksonville should get a glimpse.