My club is fishing Lake Osborne this weekend and I have not fished it in almost a year what can I expect

Lots of jet skis

You can expect rough conditions with the wind and possible rai.  I suggest sating out of the main lakes of Osborne and concentrate in the canals off Osborne or go to Lake Clarke Shores.  If you fish Clarke then concentrate on the west side in the am until the sun gets up over the houses then go to the east side and fish the pads.  Go into the canals and look for prespawners and spawners.