Sandy Lake

ya theres like a $3 launch fee. I'll warn you the water is usually super clear so i've had most luck late evenings or after dark when the jetskis are gone. ive only fished it for musky though so good luck

In the spring, when my pap was still alive, he and his buddies would fish it for panfish before Wilhelm started to heat up.  They liked fishing it but just didn't want to deal with all the recreational boaters in the summer.  They always did well on nice sized gills, crappie and perch.  Once the weather got warmer, they'd start fishing Wilhelm again for the peace and quiet.
 
Forgot to mention, the launch is by the swim beach in Stoneboro.

I think the launch fee is now $5.

it was per boat the last time i went up 2 years ago

I believe it costs $5 to launch a boat, to ski requires paying to "swim".  This is per person, not sure how much, like 4 or 5 for adults.