From an Emergency Management perspective, staying put is the best option. Not because of some government conspiracy to control people, but just due to the sheer logistics of moving people. Each vehicle needs gasoline and each vehicle occupies lane space. Of course, with planned evacuations people like to fill up their camper, the 25 foot trailer, and their other two cars taking up space. I cannot blame them, but if you were hoping to get out quickly and this was "life or death", you'd probably be disappointed.

The only reason you would want to evacuate is if you or your shelter are physically in danger, or will be in danger within the amount of time it takes to evacuate.

I'd say double or triple any estimates you have for things. Your drive that normally takes 1 hour, assume it will take 4 - 6.