You can buy logs from some petrol stations but it's mega expensive. Scrap wood is generally hard to come by on the island but pallet wood is very good to burn and you find damaged pallets, that have been discarded, lying around everywhere. Don't bother trying to take the nails out, it's almost impossible, so just saw it up with the nails in. One pallet makes about 3-4 decent fires. Good exercise too.