Hi Kirsty, Firstly I don't think anyone will be daft enough to broadcast that they hide cash in their dirty laundry or anything like that.
Take a mix of cash and travellers cheques. Get a safety deposit box at your apartments (your insurance will not cover theft otherwise) Invest in a money belt. As long as your bikini is'nt a G string no one will notice. And above all else, don't carry all your money in one place/person. Invest in an aquapac (google them) for swimming.
Travellers Cheques are easy to use. Sign the Cheques when you buy them and keep a seperate note of the serial numbers. When you're ready to cash them, just sign your name in the lower left-hand corner in the presence of the acceptor (banks will want to see your passport).
Almost everywhere in
Icmeler will cash them for you. Again, you'll find that many of the shops etc will give you a better rate than the banks
Steve