"I hope this encourages the adventures of those that are willing! "
Well I sure hope it doesn't encourage anything of the sort, at least not to anyone with common sense. Besides being outdated information, it's also irresponsible in the context of the current situation. Foreign travelers that try this nowadays might risk only being booted out of Tibet and maybe losing some money with fines, but spare a thought for any Tibetan that defies the current regulations and gives you unofficial shelter, or independently rents you a vehicle to enable your happy jaunt...the consequences for them might be very unpleasant indeed.

