We always take 3 to 4 days worth of Euros, 2 to 3 days worth of sterling (cash), and the rest in Euro travellers cheques (with debit cards and Credit cards for 'just in case'). Most of the businesses will change cheques , or take them and / or cards as payment so it's never really a problem . Ok, they might take a bit of commission but I think it's worth every penny if it saves me trekking around north-west Corfu for half a day looking for a cash machine!
It would still be useful to have an ATM back in Arillas 'tho.
Anne