You will have no problems see my report Big day out from Loch Ossian, this will give you an idea of the path from the Ossian side. Boggy in places takes the line of the burn in most cases, a bit undulating but not too much climbing at the far end. Some camping spots, not many though, area pretty wet in general. If you let me know where your looking to camp I might be able to give you a good dry site