If I wanted to carry a third small cylinder for a BBQ with me, is there any reason this shouldn't be carried inside the caravan? I would stow it in the cupboard underneath the cooker where there are drop vents and fit the appropriate strap to keep it secure and upright. It would be removed and placed outside when on site. I've done some searching on it with very limited results. 3.9kg Propane cylinder always travelled in the boot of the car when I was a tenter.