We had a power converter on the trip but if your power adapter for any electronic device (notebook computer, digital camera, ipod, etc) says input100-240V on it then you should be safe to plug it into the hotel outlets. Each hotel has power converters at the front desk if you need one. We carried one notebook computer, 2 digital cameras, 2 ipods, and 3 cell phones on our trip. We recharged everything each night at the hotel.
I know that we had a hard time waiting through the time for our trip to start but the wait was worth everything we could have imagined. Our guides were fantastic!
I know your trip will be great and that you will have many things to tell this disboard about your travels. Have a wonderful time!!!!