Although I haven't fished Pinchot much in recent years, it treated me well in the 90s and I doubt it has changed much. As a shallow lake, finding good spots will typically involve exploring and learning weed beds. As these change and fluctuate on different years, you will want to take some time to walk the shoreline or boat around a bit. During summer, the outer edges of weed beds are often most productive although the inner edges can be good in the early am for bass or all day for bluegills (at least until about early July). The upper part of the lake is where I usually fished and I had good luck in the lily pads and coves. Many of the guys who knew the lake better than I, tended to focus on the deeper, narrow upper end by the dam. Pinchot is a very good bass and panfish lake and produces some LMs in the 5+lb range as well as good sized crappies and hybrid stripers. It has been dropped from the muskie program and although there are probably some biggies still there, I would look elsewhere for toothies.
Take some time to explore Pinchot and you'll find some good spots.