You should by rights have a gas certificate here.
Usually they do not ask for this, nor any questions asked when you go to exchange bottles.
Do you know anyone here, that can look out for, and buy a second hand, empty bottle, for you, beforehand.
Then it should be easy to just exchange it for a full one.
There is a petrol station, that supplies, along the dual carriageway, between the big roundabout, and Macdonalds,
near to where you will be staying.