Making progress on my bug out vehicle now. Picked up a 1978 Sunline 8'6" truck camper for a whopping $50 from cl. It needed a good bit of cleaning up and some minor leaks need sealed up, but it's solid and will do the job. It's the perfect size for my truck too, that's the biggest camper that anybody has ever hauled safely on a half ton truck, any of the newer ones of comparable size would be too heavy.
As it sits right now it can be self contained for a good bit of time. Propane furnace, electric heater, propane stove, propane/electric refrigerator, and 12v lights. Even has a flushing toilet in it. With this combination I can keep warm and cook without having to start a fire and creating smoke that can draw attention. I have a source of free AGM batteries and will build up a good bank of them in the extra storage compartments, which can run the lights, water pump, operate radios and charge portable devices, and with a power inverter, pretty much run any household appliance like microwave ovens. It may possibly even get a solar bank on the roof to help keep the batteries charged.
All of this sitting on the most reliable vehicle I've ever owned. 34 gallon fuel tank too.
Oh, and how will I protect myself, and hunt for food? Got that covered. This isn't even all that I have at the ready, just some of the favorites. Got a crate of surplus 7.62 ammo just waiting for a rainy day, which works for both the AK47 and AR-15 (The AR was converted).