[Kidkraz]

There's a lot to unpack with this question.
There's enough space for me, to keep about a 4-8 day stay in my 2619 camper. Toiletries, bedding, water, and some clothes. Minimal food, since I don't keep much to prevent rodents.
This does NOT include any meds, Cpap support items, food or important paperwork/computer items.
Evacuation situations are a different beast; fire and flood seasons are known. They rarely happen at a moments notice, so you could set up a bug out bag, and assemble life supporting/must have meds or equipment items that can be tossed in the tow vehicle at the start of said season.