I agree with Evil Queen. I HATE smoke, yet am married to a smoker. I am trying to get him to WDW for the first time next summer. He is VERY good about utilizing smoking areas and very respectful of other's in dealing with his addiction. He hasn't smoked inside our house since I got pregnant with our first child - and even sits outside during nasty storms or freezing cold. He doesn't want to expose me or the kids to the smoke - and feels the same about others.
But, if there were no designated smoking areas at all, he just wouldn't go. If he didn't know about it before the vacation, he would find someplace where he could smoke (the sneaking) because he would not make it through a full day at the parks without a cigarette. If he found out about a complete no-smoking before the trip, he would cancel the trip or send me and the kids without him. Which would be sad for my kids who are begging Dad to go to WDW with them.