Big W sleeping options

Along the Big W you have 3 options....

Camping is available at loads of sites along the trek - at areas called 'campamento...' it is free and the site will be minimal in provisions, at areas called 'camping...' the sites are Chilean $3500 per person including use of the attatched refugio, log fire and showers. You can rent sleeping bags and tents along the trail or from Puerto Natales.
At Camping Refugio Pehoe, campers also get their own hut to use with free use of stoves and there is a fairly-well stocked shop but it is expensive.
Refugios are good if you don't fancy camping but are Chilean $19,000 per bunk.
Hot meals and snacks and supplies are available at the refugios. The evening meals are set 3-course affairs, breakfasts are buffets and packed lunches are also available.

You can get a catamaran boat from the middle bus stop in the park to Lago Pehoe refugio/campsite. It costs Chilean $11,000 each one way (about 30 mins). The other option is to walk the 17.5km to the bus stop 'Administación'.