I will be traveling solo in Greece in mid-Sept for twelve days, then meeting my friends in Athens for the top Rick recommendations of Athens, Hydra, and Nafplio (with side trips to Epidavros and Mycenae) at the end of Sept for 8 days. I have chosen to spend my solo time in the islands. Even though they are popular and touristy, I do want to to see the biggies of Santorini and Mykonos. I have a flight into Santorini and accommodations on the island for four nights. After that I was planning to travel to Naxos for three nights, Mykonos/Delos for three nights, and back to Athens either early to explore on my own or up to Delphi to see the ruins (which does not look like it will fit into the friends' itinerary.) I love food/wine, history, and learning about the local culture. I enjoy being outside in nature especially hiking and swimming. Not much for shopping, but don't mind splurging on a really nice restaurant. My usual budget is hostels and public transportation (I do not enjoy hiring a rental car in foreign countries) but I already appreciate that this trip will not be as budget friendly and I can live with that.
Here's the plan -
Santorini - 4 nights (booked and not changeable),
Naxos - 3 nights (booked but I can extend),
Mykonos - 3 nights (not booked),
Athens and then bus up to Delphi - 1 night (not booked),
return to Athens to meet friends
My big questions are should I extend my time in Naxos by a day and then visit Mykonos for two nights, or keep my itinerary as is and give Mykonos a fair shot (I would see about hiring a guide and getting as much local knowledge as possible)?
Is spending a day traveling from Mykonos to Delphi too challenging? I would take public transportation. Thank you in advance for any advice!