Actually 'considering' up / down drafts is not really the issue, because all the PIC will be doing is (in this sort of aircraft) flying the AH and trying to keep it at low pitch and roll numbers, and opposing the + / - G (actually Gz) loads with the stick.
The reason for this is that if the AH gets too excited and falls over, its bye bye. The pitot/static system will be full of water and totally useless, so there's no partial panel ever going to happen, and that little gyro is all you're ever going to have.
That about all you can do, AH, gear out and the power set for what you know to correspond to turb penetration speed. Altitude, heading or track is not even going to be a consideration. Sit there and fly it until the wind and rain noise stops. Wally Mk2 got it pretty much spot on ! None of that would be feasible without a Instrument rating.
Oh yeah, the pax noise and water coming in though places you don't usually see it !