We are planning to head to ONE greek isle end of August for 5 days? Any recommendtions? We want to chill out, relax, eat good food, drink good wine and see some vineyard if possible. Do a lot of walking around the island, biking or any other activities. We were thinking of Santorini, any laternate suggestions are welcome. Also, is this a good time to go or would it be too hot? Any nice hotel recommendations?