This is a moose hot spot. You will find this site just past the bridge off Spencer Bay Road (old logging road) on the right (when coming from the main roads).
Bring boats if you want to see moose. We had kayaks. We stayed here, just to be up early enough to paddle out and wait for moose to show up. We have gone here kayaking from other nearby campsites too. Staying in the actual site was easier than getting ready somewhere else and hoping no one was in the site so we could put our boats in.
Site is first come first serve. You basically drive down a small driveway area, into an open gravel spot with a fire pit. You could bring a very small camper. We just put a tent and parked the car so it blocked the tent view if someone pulled in so their headlights would not be on us. Completely primitive. NO facilities. Nothing fancy. A spot to sleep and get up early for photography (or fishing if that's your thing). Take all your trash with you and bring hand sanitizer/bio-degradable TP/shovel.
Because this IS a hotspot for moose. Locals do come here at dusk and dawn, but hey mostly sit on the sides of the road by the bridge that goes over the bog/water. It's also a popular fishing area - from the road/bridge. Pretty sure certain tours bring people here or tell them to come here to look for moose, but you are WAY more likely to find one if you get in your kayak.
In the two nights we stayed here, we saw 5 moose. Likely the same 2-3 but hard to tell. We saw them at dusk and dawn. You only need to walk your boats about 10 feet to slide them in the water from the camping area. Once in the water, go to the left and it goes around a bend. We always took a short zig zagging trip through the area (it snakes along) slowly and quietly paddling. They show up a lot just past the first left you take (after going left out of the site). if you are really patient you can just sit there. We are a bit stir crazy though and preferred going back and forth slowly to occupy the senses.
Good luck and enjoy!