Accommodation, Travel, Local Information

Travel and Entry

Ask your favourite LLM to "Give me an itinerary to get from place to Spetses Island, Greece, on date, and return on date."
Fly into Athens' Eleftherios Venizelos airport.
Take the blue line 3 metro from the airport to Piraeus (€9 - buy the ticket at the airport). It takes an hour, and runs about every 40 mins, i.e., in the worst case you'll take 1:40 hours to get to the port. See the details online.
When you get to Piraeus the port is 5 mins walk, but ... finding your ferry in the port might take a while - I took 20 mins this afternoon. You need to know your gate number, and try follow the signs. If you ask people, they will point you along.
Take a ferry to Spetses Island (FerryHopper is a good place to make bookings)
Take a carriage or walk to the Anargyrios and Korgialenios School of Spetses (AKSS). There is no street address. The AKSS is itself a well-known landmark that defines the location. It is rather like saying "the Eiffel Tower" in Paris or "the Acropolis" in Athens - everyone on the island knows where it is. So does Google Maps.
Walking is fine, through the back alleys or along the water front. Google Maps knows the way. The roads are rough, so stand-up walk along suitcases with small wheels will struggle.
When you arrive, walk up the path to the building that has a cafe and outdoor seating. In the main door to the right is the office, or just ask in the cafe (the receptionist also works in the cafe).

Accommodation will be offered in buildings B, C, and D of the AKSS for €90 per person per night, including breakfast and lunch. Double rooms are available, but the cost stays the same ... €90 per person per night (no discount for a double room). Each room has a private bathroom, and wifi. Here are some pictures of the rooms:
There are also hotels nearby. You can buy lunch at the AKSS if you want to eat with the people living at AKSS, for €20 per person per lunch. Lunches must be ordered and paid for by 15th October.
Booking and Paying for Accommodation (and lunches if you are staying elsewhere and want to eat with people staying at AKSS): Fill in this form, send money as instructed on the form, and email PDF confirmation as instructed on the form.
Check-in is from 14:00. Head to the Magus Café in the main building - Building A. If you arrive late and the café is closed, the night receptionist will be there and available to check you in. If you arrive early and a room has been cleaned and is ready, you are welcome to check in before 14:00.
Check-out is by 11:00. A late check-out can be arranged at no extra cost, provided that no other guest is due to arrive in the same room.