I have booked for the Acropolis on 20 June at 5pm with my two teenaged children. We also want to go to the Acropolis Museum, and would like to go in the hot part of the afternoon to avoid the heat outside . Is it necessary to pre-book tickets? My children are eligible for free tickets but they can't be booked ahead, but mine can.
Also, is it better to go to the Museum before or after the Acropolis site? We could go to the museum the following day, or in the afternoon before our Acropolis entry time.