For a year trip maybe Gaslow would be the way to go. However do bear in mind that depending where you are going LPG stations are not available all over Europe. We have not had a problem filling ours in the likes of Germany, France, Italy etc but if your heading east or indeed even to Spain they can be thin on the ground I am told. Maybe have a back up plan and a secondary "foreign" bottle if that is possible. Just out of interest, how are you going to heat the van?
We have gaslow and love it but its used all the time for heating, water heating and cooking including an oven so an 11KG bottle may only last a week or so in Winter and just about a month in summer.
