I have heard the story of Real Estate agents that bake a batch of cookies in the oven at the house they are going to show for an "open house". (I am not true if this is a myth or fact, but the theory seems sound.) Not only would this fill the house with a pleasant, and tasty smell, the theory is that it makes the house they are showing more appealing and feel more like a "home".
In your case, this would give the house a smell you are looking for (pleasant) and a wonderful side effect is that you have a batch of cookies to present to your guests!