Skyros can be accessed from the port of Kymi, a couple of hours by car or from KTEL bus depot in Halkida.
The ferry runs daily through the year with often more than one sailing in the summer season. It's subsidised and under 10euro each way and takes about 1 hour 45 minutes to Linaria the Skyrian port.
During the summer the island population swells dramatically from 3000 to 8000 approx but the island doesn't feel exploited or overcrowded. Additionally the island is popularised by Skyros Holidays which operate two holistic health resorts on the island - one in the chora (local name for the principal town Skyros) and the other at the picturesque venue of Atsitsa bay.
Famously the English war poet Rupert Brooke is buried on the southern part of the Island at Tris Boukes bay, where he died in 1915 and was laid to rest in a beautiful olive grove (30 minutes drive from Linaria).