Hi Ian, having been to Dalyan for the last few years, simply park the car and head to the river there are local co-op boats which go to the beach every 30 minutes in high season. It was 15tl return last year. Alternatively you could catch the dolmus from the mosque square which will take you to the other end of the beach. Both have facilities for drinks food and toilets. The dolmus end has a turtle hospital which was free to enter last year, but as you will be driving you could drive to the bus end, there is a charge for parking. Some people get the dolmus and then walk the length of the beach about 5 kilometres (to far for me). You could also hire a boat for yourself depending how many are in you party, as there are usually some there for hire, most provide a bbq have drinks and some have toilet facilities.