Same here. I can walk in the water of any lake and river and not technically get in trouble for trespassing. Here though it is to the high water mark of any water body. If the winter level is 3 feet higher then you own to that point, nothing more. So if the water is low and you can see a distinct high water line then you are okay to go along the water and fish. Not a flood line though, just a normal high water mark for winter.
I wouldn't want to own a lake up here. I knew a couple that made their own and it was a nightmare meeting EPA, FDA and other agency rules and restrictions that they have to follow.
I love taking my kids fishing, now if I could just manage to fish at the same time.