This stretch of MCU caches are hidden along the publicly-accessible snowmobile trails maintained by the Perkins Ridge Sno-Travelers. These trails are open to hiking, snowmobiling, snowshoeing, skiing, horseback riding, and dog sledding. No knowledge of the MCU is required for these caches; they are along the lines of the Alien Invasion caches.
Wilson Fisk is the Kingpin - a crime lord and major antagonist in Marvel comics. Originally a Spider-Man villain, he later becomes primarily a Daredevil villain. As such, in the MCU, he appears as the primary antagonist of season one of the Netflix Daredevil series, portrayed by Vincent D'Onofrio.