Sorry but i agree with Joie. My travel iron is going with me. We have been on 2 cruises with RC and never has anyone had a problem with it. Just be responsible and unplug the thing when you are finished.
If you insist on bringing a travel iron please get one that turns off automatically after a period of time. Or call me, and I'll go with you (your treat!) and make sure it is unplugged after you use it. <wink>
You should check with your cruiseline to see if they offer ironing service. We had it on HAL for only $15/cabin, and they ironed anything we gave them for the entire week! It was the best 15 bucks I've ever spent on a cruise. Plan for a 24-hour turnaround; your evening wear will be hanging in the cabin when you come in to get ready for dinner.