Honestly, and I’m already ducking when I say this, the easiest and safest way to do woodgas hidden in a vehicle is to use an electric vehicle and charge it with something like this:
Then all you have to do is hide all your activities at home with stuff like muffler or noise cancelling speaker. It won’t fix shtf scenarios unless you pack the system up. But it gets around laggy acceleration and resale value and vehicle mods.
Standing out has it’s advantages in the city, because theft rings won’t steal it even if it’s brand new and you leave the keys in it. Too many mods to make it valuable for parts.