Our 11-day Tatshenshini-Alsek trip traverses the wildest parts of the Yukon, British Columbia and Southeast Alaska. This 190-mile expedition journeys through the world's largest protected wilderness spanning 22 million hectares. Arguably the most scenic river trip on the planet, you will be immersed in a primeval land that is beyond description. The "Tat", as it's affectionately known by the guides, affords us many opportunities to explore the mountainscapes, glaciers and…