Arriving on the 21st June for 10 days are the tavernas busy and do you need to book a table?
Some of the more popular ones might require a booking but there is so much choice that it should not be an issue.
Usually there is no need to book tavernas, however the Olive Tree taverna for example is quite popular and fairly small so would recommend booking for that and others can get fairly busy on special nights such as Greek night so may need to wait for a table if you have not booked.
Just got back home yesterday and the Olive Tree Taverna were turning away people who didn’t have a booking, it’s that popular.
Well worth the wait.