We used Peat Taylor and very happy with him. Many people use him. Have to book online ahead of time to reserve space. He will take u wherever you want to go. Will customize your tour. You pay when your tour is over. We saw some beautiful scenery up in the hills. We visited about 4 different places and did the river rafting as well. He waited for us at the end. I personally would stick with the shopping mall that's right outside the large fence area. It was a very nice place and no one to bother you there. Very colorful buildings..this is where they usually drop u off after your tour.
Any ?'s, feel free to email me.
If you don't use the ship's tours, use someone that's recommended on these boards and many people have been happy with. You just never know what can happen.