Rather than overnighting at the north ranger station, this lovely spot 3km back down the trail has two five-bed gers with solar electricity and a toilet. It's run by Borsan, an affable Kazakh nomad who lives across the river. You can hire horses (T25,000 per day) from his family; they can also whip up a home-cooked meal (for a fee).
Look for the tent sign as you drive up the valley toward the north ranger station.