Rockets. The other end of Nipissing can be a good choice too. Sheltered fishing in high winds or nasty days among the many islands. Pickerel, bass, pike, perch, muskie .........well just about everything except trout/salmon. This is the area of the lake that I hang out.
The first place that comes to mind for a place if you are bringing the kids along is Promised Land Camp. I see he has an ad running on here too. Has a playground and a nice beach with water tubes and slides. He runs a nice place, I don't believe you would be disappointed.
There are a few other nice places as well and if you need advice on this area give me a PM.