With my family, I just ship things to them just so I can quit worrying that they'll do it themselves. Also basic requirement of guests staying at my house, is watching
online Spike TV’s Surviving Disaster.
I also make the families' of the dogs I volunteer to babysit when they are on a vacation, bring an empty five gallon water jug that I fill when they get here, to be emptied when they leave, and enough dog food two weeks past the time they are returning as part of their stay-over kit. They maybe unprepared for themselves, but at least, I can prep for their dogs.
You're a good woman.