Hmmmm....just looked at the photos I took today, and did another search online, and I'm fairly sure I've discovered the source of the fragrance.
Wild grape vines! They are apparently very fragrant when they are blooming, and I've noticed wherever I smell that fragrance, there is an outgrowth of vines meandering their way through the honeysuckle and other shrubs...and the leaves & flowers (if you can call them that, since they are all green) look like the following:
Wild grape leaves and flowers
I'm pretty sure that's what it is...but if not, then it's got to be the Locust Trees. I honestly don't think it's the honeysuckle, because it's not blooming anymore.