On the Thanksgiving weekend, I ventured out to Johnny's Lake, just west of Stony Plain. Access to Johnny's Lake is a bit tricky the first time so I have put a map below. You take Highway 16 west of town then turn south on Highway 770 (just past the big turn north to Whitecourt).
Go south on 770 and then turn west on Township Road 530. After four miles, this road curves south and becomes Range Road 25. Alternately, you can come up Range Road 25 from the south (Star Lake). Range Road 25 is the north-south road on the right side on the map below.
Turn into the community and drive to the red arrow, which is an unmarked lane that leads to the boat launch (green arrow). There is lots of room to park at the boat launch but no other facilities (nearest washrooms are at Star Lake to the south, I think).