Whoa! What a good time, and a great value ($40 for the 2-hour tour). Dress properly for the weather, taking into account you will get wet. You might want to bring something to protect your camera or phone (my wind breaker with pockets was enough). You have a tour guide pointing out the sights, and he/she is accompanied by a spotter, who will make sure you see plenty of wildlife (if you are lucky, you may see a bald eagle or two). You will be informed, you will be awed, and you will probably be drenched, but it is worth the time.