I know a lot of people with whole house generators and none of them have it for a shtf scenario. It's for the constant power outages that plague our grid. Some are 30 minutes, some are 6 days. NG always runs.
Most common reason around here is 2-10 day power outages due to hurricanes. Although with more power underground its getting better. NG isn't common here so people get a large LP tank buried in their yard. Personally I wouldn't want be in a four hour line at the gas station. I think how I would go would depend on my location and how easy it was to source any certain type of fuel during what ever type situstion I was planning for. But unless your producing your own fuel or electric power your on the grid to some degree.
