There are a lot of smoking areas, but ALL the resorts have what, to my non-smoking self, seems like a lot of smoking areas.

And, as usual, at CSR they're liberally sprinkled along the lake.

But of course most of the time there's no one in most of the smoking areas actually smoking.
I'm sure it's more of an issue about the same time crowds in the quick serve areas are an issue -- in the morning before people have gone to the parks and in the evenings and people are settling in. And it depends on how many smokers are in the resort and how strongly they feel about smoking.
If there's a convention of some group that's particularly prone to smoking, I expect it could a problem, but most convention goers are no more prone to be smokers than the average Disney visitor. In some fields, smoking is viewed as "a career killer", because so many businesses won't hire smokers or otherwise try to discourage it; if that's the group having a convention at CSR, smoking is not likely to be an issue.
You can always plan your routes to avoid the smoking areas, too, although it's sometimes inconvenient. There's a map with the smoking areas marked here:
http://www.wdwinfo.com/resortmaps/cspringsmap.htm
But, again, we've gone through many a smoking area with no problem (and one of my daughters will react just to used cigarettes, so we're pretty aware of them). We like to know where they are so we can avoid them if necessary, but it usually isn't necessary to change our route in order to avoid smokers.
