Well, I failed. Last night I bought (actually stocked up) on some tarts by Yankee Candle. I thought they had a pretty good smell. Found them in the trash this morning. DH said the room smelled like a toilet bowl that had been scrubbed with a pine cleaner.

I think the poster above may be right...get a *real* wreath and hang. Thanks everybody!
ETA: Couldn't find Scentsicles but won't give up.