Some operators point out that although they expect to perform fine in terms of customer levels, being able to run profitably is another matter as costs continue to increase.
Mae rhai gweithredwyr yn nodi er eu bod yn disgwyl perfformio'n iawn o ran lefelau cwsmeriaid, mae gallu rhedeg yn broffidiol yn fater arall wrth i gostau barhau i gynyddu.