I have gotten the impression that the vol.tour is not recommended for someone with resp. problems. According to the excursion on RC, the air gets thin and there could be some difficulty breathing with the sulfur. This has made me reconsider any Volcano tour. As for flying, I don't think I can get in a helicopter.
Explorer of the Sea 03/28/10
Explorer of the Sea 04/26/09
Explorer of the Sea 9/28/08
Celebrity Ships previous sailings