I'm sure you'll get more info and up-to-date from one of the
ICR staff. In the meantime, I was told that I could get a boat but would have to go from
Icmeler to Marmaris, then onto to Bodrum then onto Kusadasi. Staff at my
hotel said it would be more direct to get a coach from
Marmaris (they have air conditioning) - but to check out the return times - they weren't sure about times of returns. It seemed it would be worth it if I stayed overnight there.
Hope that helps. Hope ICR can help more than I - suppose the other option is to hire a car - look on the ICT home page for rates.