This was a very unique but exciting experience. Half an hour is probably enough if going for a first time (as we were). Parking is easy and free, and is directly adjacent to the restaurant and check-in area. Our guide was great, and allowed to see the wildlife, slowing down the boat and pointing at where we should look. Cameras are good to use, but it gets windy so remove your hats! Ear defenders are provided - it gets loud! All in all, a great experience.