Propane camp stoves usually produce more carbon monoxide than regular propane or gas stoves that we have in our houses so you could be putting out more carbon monoxide inside your house.
It's best to not use the propane camp stove inside but if you do need to use the propane camp stove inside try leaving a window open just a crack while you're using the propane camp stove so you don't get carbon monoxide poisoning.
But if you only use the propane camp stove just for cooking and not for heating then it's likely safe enough to use the propane camp stove indoors as long as it's not running too long at a time.