Review and Tips
Typicallly you´ll start at Gualin House or at Loch Stack and since I've chosen the Gualin House approach I am going to describe it that way as well.
During the summer you can use the D&E coach but apart from that there is really only hitching or driving yourself in this remote corner of the highlands. You'll definitely gone need a landranger or explorer map and a compass, accompanied by the knowledge to use both.
You can follow a good stalkers path for about 2 hours (mind you there several different approaches for the main ridge. I'll only describe one here!) up to the point when you see a stream coming down "Coire Dùail". You can find a more or less distinct path on the right hand side of the stream, which can be followed up to the Loch "Glas-Choire Grànda". Now you'll head roughly northwesterly and want to keep the eyes open for "Ceann Garbh" but there is no path and it will be rough going and some easy scrambling might be necessary as well. Be careful this part can be quite tricky in poor conditions!! As soon as you're on the main ridge things become easy and here is also the best camping spot that hill has to offer (a 2nd but much smaller spot can be found 20 min down from "Ganu Mòr). Now you can either retrace your steps or follow the ridge all the way to "Bellach Horn". Foinaven always offers an exceptional ridge walk, but if you're able to use this hill as a camping ground you can see that this is one of the most exposed spots in the northern highlands with a clear view north. Since there is no light pollution at all this can be, even in spring and autumn, an excellent spot to experience northern lights. Of course this would also be possible in Winter but conditions can be very, very rough and you would probably need alpine equipment. Also you would need to keep an close eye on the time.