Living in earthquake / fire / electrical blackout prone California, my B seconds as my bug-out vehicle. It's stored an easily walkable )if necessary) 2 miles from my home, Black and grey emptied, FW full, batteries fully charged, propane at least 3/4 full, gas tank full (600+ mile range per full tank), after a trip. Non-perishables for at least three days, and a variety of hot to cold apparel remain in the rig.
In the event of a potentially threatening / damaging event, I'd just have to grab essential documents from my file and be gone.
Otherwise, it's always ready in the cases of just wanting to go RVing without spending time with preparations whether for a few hours or days at a time.