You can access the lake by Road 96N...east of PTH 9 north of Petersfield. 96N is also Chalet Beach road. If you have a 4 wheel drive vehicle, you can drive onto the lake and follow the myriad of trails that take you southeastish. There are a bunch of shacks out there. Fish are caught at virtually any depth over 4 feet. The trick is to keep moving until you catch some eyes. When the bit stops, move. It is tedious but moving produces eyes if you're not fortunate enough to drill your holes right on top of them.
If you're walking out, then walk out straight out from Chalet Beach until you find 5+ feet of water. Good luck.