Taking the WH route for Oss and Dubhcraig, you can descend directly north off Ben Oss taking a line down a spur until you reach the floor of the glen where you can either head over to the track or just head towards the farm at Cononish across the meadow, easy walking. The river was easy to cross at the beginning of June so shouldn't be any different now.
Saves retracing your steps
Or of course come in via Cononish and aim for the northern spur of Oss, or take the line of the last burn coming down from Oss
The walk out through the woods beneath Dubhcraig were no problem a month back, although still a couple of wet spots