Can anyone who requests non-smoking for medical reasons tell me about the safety (or lack thereof) of DCL? We're planning on the 3-day cruise, but the more I read, the more worried I get. Am I going to stop breathing while onboard? Is there anywhere I can go for safe, fresh air? Is there anyway to make sure I don't have smokers next to me, or in my room previously? Thanks for any advice you can share.