Its not at all stupid to think about that where I live at least. Our power was out for 2 days in July 1992 when the San Antonio river flooded. There was also no internet service during that time. I ran my generator for the entire 2 days and kept a nice sps reef alive. Either a large UPS or small generator just for the tank is worth it in my opionion. You can control when it runs and when you run your frig if you happend to be in town. When I get serious about this I'll put a big UPS on one of my returns from the sump for all those out of town experiences. I'll also fix my generator cause it smoked on the last hoopla.