No set Travel Agent trips by boat or coach but I am sure ICR could organise a trip for you.
Alternatively you could use the Turkish coach services which runs out of Marmaris via Dalaman to go to Fethiye..
ICR Travel Holiday Forum for Icmeler & Marmaris with reviews of hotels and real customer reports
https://www.icmeleronline.com/forum/
https://www.icmeleronline.com/forum/viewtopic.php?f=19&t=11259