Those cameras slung over your shoulder represent five to six years annual income on some islands. Do the math. A family of four could retire off my camera gear alone. The best way to photograph the islands is to rent a car. Set out on your own.
Most Islands have car rentals and the rates are relatively cheap.
The right side for them, wrong side to you. The roads are in fairly good shape on most of the Islands, and it's almost impossible to get lost. On an island most roads led back to where they started. Start out following the coast roads. Fishing villages are around every turn.