We went on a trip to Ephesus from Marmaris a few years back, and that was a day trip. We left at the crack of dawn and had plenty of stops for drinks, fag breaks, loo trips. We got there at about 11.30 and therefore walked around Ephesus in the heat of the midday sun. I would have killed for a parasol! However it was brilliant, it amazed me that very little was blocked off- you walked over Roman tiles and could touch everything! My grandson even sat on a Roman loo! [No he didn't use it] We were also taken to Selcuk to the House of the Virgin Mary and returned back to the hotel, shattered but very happy, late that night. All the meals were provided in the cost of the tour, which was ridiculously cheap!
Jan