The lake is def large enough that you can drive away from any crowds.
I'm not real familiar with the north side of the lake but I will help where I can. You might ask some of the peeps at North Shore about that area and things to avoid getting out towards the main lake (towards Brady). I'm sure they will recommend some places to take the houseboat and Hotel Island is likely to be at the top of the list.
The lake is a rocky bottom. Clamcakes had issues when he came up. Hopefully you can avoid that! You can probably search and find his thread.
Here is a link to a map of the lake with a few points of interest. These are just quick thoughts.
https://maps.google.com/maps/ms?msid...11481,0.247192
Let me know what questions ya'll have and I will try to help out. Like I said, above were just some quick thoughts on a few locations. I don't mind giving additional detail.