Have only seen one on land twice in a life time of coming to the lake. Once was last year in my own back yard just as I sat down for breakfast. The other was over on Smith Point about 25 years ago just after dark it was walking down the road. I have see them swimming to/from islands a few times.
I know there is a secret place in the lakes region you can go to see them in numbers around dusk, but i forget where it is.