I don't have a smoke alarm as I can't envisage a situation in my van where I'd need one.
I cannot believe you actually posted that.
I spent over 30 years in the fire service and witnessed the results of such poor judgement.
Small fires can develop in hidden parts of Motorhomes involving electrics, and due to the small volume within a Motorhome smoke can quickly reach toxic levels. If you are sleeping you may never wake up succumbing to the toxic fumes.
Most people die from inhaling such fumes in fires. Also carbon monoxide detectors may not detect these fumes or do so when it is to late.
You can buy a reliable smoke detector for the price of two coffees, I simply cannot understand anyone not having one.
Also it’s important that a reliable means of fighting a fire in its early stages is carried on board.
The most common type supplied are dry powder which were actually designed to fight metal fires (magnesium) during WW2 by the RAF. Set one of these of and you will make a hell of a mess in your pristine mh.
A wet chemical extinguisher supported by a small fire blanket make for the perfect means of extinguishing a small fire in a mh. The dry powder extinguisher would be excellent for fires in the engine compartment.
But remember never tackle a fire that has taken hold, get out and call the fire service.