I always refill my gas cylinders at the petrol station and have never had a problem.
Okay before you all jump on me I have gradually moved over to Gaslow I started a few years ago with just one bottle and used this keeping a Calor lite as a spare, then a year later bought a second bottle but soon got fed up having to remove them to refill all the time so then bought the full refill kit that fits permanently to the caravan. We have just bought a new caravan this year and the dealer moved the kit over as part of the sale deal
The point I'm trying to make is yes it is pricey to move over to a refillable system but you don't have to buy it all at once, just start with a single bottle and go from there, I will be moving it over to my next van as well.
I never have to worry about leaving home with half bottles as can just pull up on route and fill up before arriving at the campsite, it lasts well as well we camped for a six week stay last year and never needed to refill. Yes it was summer so didn't need to heat the caravan but we did use the BBQ most nights and yes we had EHU but it still did the six weeks
It did cost around £8 to fill a bottle but with gas now 20p cheaper than the last time i refilled it must be around £5 or £6 now to refill them
I think manufacturers should start thinking about moving away from Calor bottles and fitting a sealed permeant systems in all new vans or at least making it an option you could have fitted if you wanted.
Calor have such a hold on the camping market but I've broken free of it..... Question is now what do I do with my 3 full bottles of Calor Lite I still have
lol