Systems are designed with maximum power usage and minimum winter solar, and number of days of clouds that can be expected. The Solar Living Sourcebook has the worksheets for system design. These maps can assist someone wanting to go off grid;
Over 2/3 of the US is good for solar(yellow or red);
https://www.nrel.gov/gis/images/map_pv_national_lo-res.jpg
and about 1/4 is good for wind power;
https://www.nrel.gov/gis/images/30m_US_Wind.jpg
Places where it is easy and places where it is hard to build with alternative energy and building materials;
https://earthship.com/pockets-of-freedom?utm_campaign=freedom_map&utm_source=newsletter_8_21_12&utm_medium=email
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This is for growing your own food outside reference;
https://planthardiness.ars.usda.gov/PHZMWeb/
this is from pafarms post on the future climate to consider in location;
https://www2.ucar.edu/sites/default/files/news/2010/pdsisc-method%3D2-2000-09%2B2030-39%2B2060-69%2B2090-99v2corrected.png
