>> wouldn't consider using a camp stove anywhere indoors, even "next to an open window". Same thing goes for "...in the garage, with the garage door open". There's no guarantee that carbon monoxide will drift out of the open window.<<

My countrary opinion from a region where 99% of us cook with natural gas or LPG:

1. CO rapidly homogenizes with the atmosphere; it very very rarely concentrates more tham momentarily, usually only because of sustained thermal stratification (like a house fire).

2. What is the difference between using a gas home appliance (stove or oven) and using a gas or naptha stove indoors? FIRE!!! There is a slightly greater danger of fire, so keep an extinguisher handy. The CO danger is about the same. This certainly applies in a house that already uses natural gas or LPG for the stove & oven.

I suppose that if one has a home that was expressly designed super-tight and with electric-only cooking appliances, there is an elevated risk. Those tend to be "sick" houses already, though, with extremely poor indoor air quality. A tight house designed to use an enthalpy exchanger for good indoor air quality (they are still not the dominant design in the USA) will become a "sick" house in fairly short order when the power is off, regardless of running a stove. In a house of that design, open some windows when the power is off, regardless - air quality goes to heck in less than 24 hours in most of those houses. With some windows open, we're back to an adequate ventilation scheme to run a camp stove. See fire danger in #2.

So it depends on your house. Keep a good fire extinguisher handy and a CO detector is cheap insurance. Learn the stove operation and quirks outside, then move the operation inside and repeat. Be conscious of countertops - many stoves can get hot enough on the bottom to scorch a countertop. Putting the stove on a small scrap of wall board, edged and covered with foil ductwork tape for aesthetics is a fool-proof way to avoid beatings-by-wife. Improvise something else if need be. But try it all out before you need it.

HTH,

Tom