There are only 3 or 4 dolmuses a day on that route although during the term the school buses will also pick-up hitchhikers. I can't remember the exact times but they leave Fethiye around 07.30, 12.00, & 17.00 and they go through Hisaronu about 30 - 40 minutes after that.
You need to look out for dolmuses with Faralya and / or Kabak signs in the front window.
You'll probably be more successful if you walk the LW from Ovacik to Faralya and then "thumb it" along the coast road into Oludeniz as there are several paraglider transporters returning empty along that route.