**_Drug-addled delusions mixed with sylvan horror and a bit o’ dry humor_** A group of youths make camp in the backwoods of the “emerald triangle” in Northern California (where there are numerous marijuana farms). Unfortunately, they trespass on the land of a paranoid man and his wife (Bill Sage and Sabina Gadecki), who evidently believe in malevolent aliens. Anastasia Baranova plays their visiting niece. "Welcome to Willits” (2016) is low-budget horror that starts with similarities to "Night Skies" (2007) and "Extraterrestrial" (2014), but takes a different path, not to mention adds some…