While abroad with the N.U.in Greece Program, I was on the team that planned a trip for 151 people to Istanbul over the course of two weekends. We went by bus, which was about a 12 hour drive, and I was responsible for the itinerary of activities. We stayed almost entirely on the European side, with a brief stop on the Asian side just so we could say we had been.
I fell absolutely in love with Istanbul and would love to go back in a personal capacity. If we could have changed it to N.U.in Turkey, I would have.
You can find my posts about Turkey here.