An electromagnetic pulse - natural or man made - should be at the top of the list of bugout events. People will have to move to potable water because it will take weeks to restore even the most basic services.
Honestly, if I'm leaving the house for a local/regional disaster (a tornado is going to level my home or some other crazy thing is going to happen to destroy my city and I have a day or two's notice) then I'm not really thinking about guns. I'm grabbing my envelope of emergency cash and packing up as much clothing and other supplies as I can and hitting the road There's a good chance all I'm taking is my usual carry gun, and I'm not even taking that if my plan is to evacuate to Chicago or somewhere else where it isn't welcome.
Now if the reason I'm evacuating is that there's been some sort of serious breakdown in society and people are openly murdering each other on the streets I'll be thinking about how to protect my family on the way out of town. That means the full-size handgun and AR no matter where I'm headed.
First, I'm not really concerned because I don't live in a mobile home.
Second, you usually only have a few moments notice, so I'm grabbing cash and jumping in the car. You don't have time to make choices. Like a few others have mentioned, if you have time, guns would be down the list of what to take.
Wow, that went poorly...Closed.