Honestly, after a month of backpacking which, although great, caused me enormous stress and depression related to last-minute accommodation booking, when all websites about the Greek ferries tell me that you can never rely on schedules and all organized tours I find on the net add up to the same total (which amounts to, all in all, less than 200$ a day), what is to keep me from thinking that a worry-free organized tour including all the elements I'm interested is, although too expensive for my taste, a godsend???