Lemon or lemonade flavors have a very light scent, and if you use a lower % it can be practically unscented. You could set out lemon candy, candles, or a bottle of lemony lotion to give the impression that's where the scent is coming from.
You could vape FW's Candy Cane and have candy canes sitting there, or peppermint Altoids. Everyone would assume it's your breath
Cinnamon definitely leaves a scent, but if you have some potpourri, you can easily blame it on that... or those cinnamon-scented pine cones the hobby stores all have this time of year. Or leave a pack of Dentyne gum handy.
Apple and pear are two that are nearly undetectable at low %. Not pie flavors though - just plain apple or plain pear. If you like plain tea or coffee flavors, and you drink the real thing, the slight aroma would not be suspicious.