I often wonder just HOW cold do people GET anyway, to run a heater when camping?? We camped in October a few times with our old huge pop-up tent camper. It was COLD, too. This is Minnesota after all... But we never ran the heater.
At night, ya pile on the blankets, and you're pretty toasty. Specially if you have a partner!
You can dress under the covers, too, I discovered.
After it got so cold you thought you needed heat- we just stopped going camping!
It pays to be over-cautious when using those portable heaters I guess. As well in the house, too, it seems. Everyone ought to have a good gas/carbon monoxide detector indeed.
Boy, THAT boating incident is sure a tragedy. I just can't imagine how their relatives can cope with a loss like that. That is so horrible.