Hi Clare,
We are staying at the Senfoni Hotel (read some good and bad reviews on that place, but its only a base for sleeping and showering) and we fly out on Sept 27th. I dont think its too far from the beach. When we went in July we were right on the beach front behind Natalies Steakhouse, brilliant location and the hotel was marvellous.
I hope you have a great time in Marmaris, I did in July but it was too hot to do too much in the day, so I intend to do a lot more this time.
I am sure you will love Marmaris, I think everybody who goes out there fall in love straight away and keep returning. The people are just wonderful and cant do enough for you.
Mary.