Göçek in July IMHO is not a good idea.. It will be very hot and crowded. Göçek is ideal either in May or October. It's true that there are a lot of anchorage but the best spots will always be booked mostly by motoryachts. There are one or two
marinas in Fethiye, three four in Göçek. In almost every bay you will find restaurants jetty with
mooring lines. Normally they don't charge anything as long as you eat there and they are not
cheap..
Fethiye is 12 nm from Göçek from sea and 30 km by road. İf you start from Fethiye towards one of the bays on Göçek side, it would take couple of hours of sailing. Or, you may turn towards the dead sea where there will be slightly less
boat and good
anchorages.
For July the west of Marmaris towards Datça is a better option althought you might get a bit lively winds and less people.
Cheers
Yeloya