I can't help with fish shops, but an acquaintance moved there several years ago for a few years. He fitted his pickup bed cover with two nice size solar panels, two deep cycle marine batteries and a swamp cooler. Leaving the window between bed and cab meant he never had to get into a hot vehicle.
When camping he fitted a plywood panel in the cover's door and two flexible dryer ducts that ran to his tent. He had the only air "conditioned" tent in the mountains.