There are about 1400 islands in Greece. Hitchhiking in cars will likely prove much easier than on the mainland! Hitchhiking a boat may be possible too. Hitchhiking a ferry from mainland to an island can be difficult: usual method of asking the truckdrivers (and other drivers) is not working as they have to pay for every passenger, not just for the vehicle.
Some islands are
- Corfu or Kerkya,
- Chios, the best for hitching!
- Lesbos or Lesvos,
- Santorini (Thira).
On Ikaria almost every driver is taking you, but they are usually not going very far and there are not many cars.