I have two chargers. A small for backwoods hiking and a larger one, that could be used for hiking and would be annoying to pack around but it does work and I will have it available should the need arise.
Setting up an automobile or a truck with a large power inverter and, if necessary, an upgraded alternator, will help in a pinch even if you have no room for a generator. It will need to be hard wired to the battery for more than about a couple hundred watts. If you’re expecting it to keep a refrigerator or freezer going, test it first as starting their compressors needs much more power than running them once started.
If bootlegging a generator into your house through something like a welder or stove outlet, be considerate of linemen who don’t like to get electrocuted; turn the main house breaker off first and duct tape over the handle. (Also you aren’t trying to run the entire neighborhood that way.) The pole pig will gladly step your generator back up to the several thousand volts that are used for local distribution.