But it is completed only rarely by fell runners (compared to other more famous 'rounds'), I think because it is pretty rough underfoot in places with a lack of paths, plus there were the access problems over the Arans, not now an issue.
The route does lend itself nicely to a backpack trip, I started it with my wife about 5 years ago, planning a good 3 - 4 day walk, but the forecast wasn't quite right!! We were caught in a big storm on the Berwyns, big thunder and lightning (and bloody midges) so abandoned back to Llanuwchllyn and the bus!
Couple of weeks ago I did this route from Llangollen to Barmouth, it's aprox. 60 miles and 14,000ft taking in all the trigs on the way. I wrote up an account and it's here on the High Sports (Shrewsbury) web page if anyone is interested.
Seems a similar attitude to 'boy racers' who have just passed a driving test, acquire a powerfull first car and pay scant regard to any driving advice (go slower or you will kill/yourself/somebody else).
Proabably the only answer will be a painfull, serious but non-fatal (hopefully) accident or incident; hope nobody else suffers with him. Ideal would have been for him to have broken his leg on Ben Nevis and spent another couple of hours up there before "rescue".
Beside the river just down the road from me is an official 'caravan club' campsite with all mod-cons, in the village really, local pub is the Royal Oak. About a mile up the valley is a farmers field campsite (also beside the river) , short walk to the Towy Bridge pub, so probably one of these two?