Also I like using candles on a regular basis. Some really good ones from White Barn Candle Company are:

Firewood (Henri Bendel)
Spiced Cider
Kitchen Spice

And there is one called Tobacco Bergamot (I think) that is sold at Ulta cosmetics.

Those all are "similar" to smoke smells so they cover it nicely. But better not to arouse suspicion if you are not the type that might buy candles anyway.