First time we went there, 1985,(we stayed in Argostoli the capital up the road, in the Aenos....) there was three hotels and the only food 'outlet', was a wheeless old ice cream van on Makris Gailos (Big beach) selling water, soft drinks, beer and gyros/kebabs.....or traips to the hotels.....
Last went a few years ago, and it was unrecognisible.....loads of hotels and bars etc all along Lassi....still a lovely island though. Make sure you get up to Fiskardo and Assos....and to the Lake Mellisani trip too.
A local ferry runs every hour or so from Argostoli over to the peninsula of Lixouri, was a great loooooong beach there called Xi (pron. ix-ee)
Very green island, worth hiring a car and exploring.....enjoy it.