We can get so obsessed with such things that we make our lives miserable, or we can do simple things to create peace of mind and preparedness.
Our experiences have been more toward using the RV to get away from disaster areas at home. Several near misses.
Our RV is always parked at home with near-full fuel, full water, non-perishable food, bottled water, first aid kit, four-season clothes, two-way radio... You can create your own list.
One item I can get preachy about - potassium iodide tablets. If you live near railroad tracks, in areas with medical services or the like, you could be exposed to radiation. An investment of $10 could save your life.
A friend of mine was laughing at preppers. Though I am not a prepper, I do think about such things. I asked my friend, "What are the chances of you facing a disaster? Maybe one percent?" He agreed. I then said with 365 days in a year, maybe you should spend 3.6 days a year preparing."
Not a firm logical argument, but it floored him.