Re: Lake Michigan - Traverse City area
There are too many fishing oportunities to list in that portion of the state. I haven't been into Wilderness State Park in a number of years, but fished a small lake (canoe) just west of I75 for panfish - spectacular day.
There are many campgrounds of all types. I prefer the State Forest Campgrounds. Usually on water, hand pump, pit toilets, and small & quiet. MI DNR website has a list of them. Michigan now requires a vehicle permit for access to state lands & parks. Think they're available via the web (I get mine with vehicle registration).
TC is the "big city" up that way. Can be very busy with tourist traffic starting Memorial Day.
Legs Inn in Cross Village for a great dinner.