I think that's just good planning. I have a change of clothes in every vehicle as well as a.. not quite bug out bag, but like protein bars and some bottled water in the event I get stuck somewhere for a day or two. It's been handy, like when a friend got vomited on at a party - I had spare clothes for him.
I know this is weird, but I also keep a brand new pair of socks in the car, in a plastic bag, under the seat. If I am having a really shitty day and need a mental break, I grab a fresh new pair of socks. Nothing's quite so nice as a new pair of socks.