I use a Cadac every time we're away in caravan for cooking breakfasts and all sorts of food for evening meals plus regular BBQ, I went down the route of getting the connector for caravan outside tap thinking it would save carrying another gas bottle, I think I used it once and then abandoned the idea completely, when you come to use the cadac if your connector on van is same side as awning you either BBQ in awning, risk to life from fumes! or you use a gas bottle, it's not a good idea to simply use a much longer hose to get cadac out of the awning as this in itself presents problems, such as trip hazard from the hose plus gas pressure drop if the hose is too long, I think cadac specify a maximum hose length that is safe to use, another problem even if you can position cadac out of the awning is that your still restricted as to position and it makes life much easier if your free to position it where you want so as to be in best location to avoid wind, the connector I bought was consigned to the waste bin after its one and only use.
BP