Have fished both in recent years! Hell I grew up on Joslin! Have never really smacked em good on neither lake! Not saying you can't find a few, but they can be hit or miss! They have recently been treating the weeds(milfoil) in Joslin the last few years! so the fishing has changed a little! I used to catch some real quality crappie outta Joslin! Tried for em a couple weeks ago and only caught dinks! South can be productive if u can separate from the pack! I've done well on the little lake that south connects to! But it's a hell of a walk without a machine!