Hi Parker,
For a quieter holiday in Turkey, you won't go far wrong in Turgetreis, not too crowded (at least it wasn't when I went in September last year (5th-19th) and there are a few excursions if you like sight seeing, Pamukkale and Ephesus is a must see. Also there are relaxing boat trips where you stop off for swims, usually including food and sometimes drink. The local village tour is also good fun and really opens your eyes to the 'real' Turkey.
As for places NOT to go if you like peace and quiet are places like Marmaris, Bodrum and the major 'touristy' places. I found Bodrum to be like Blackpool but with nice weather lol.
I'm sure you'll enjoy it, it's a lovely place, glorious weather and all the locals we met are very nice people.
Hope this helps