One of my hives swarmed and hung waaay out of reach. Beneath it, I set up 3 medium-depth boxes with frames. I added some drawn comb and a comb containing honey. I added a few drops of lemongrass oil, and a few drops of a queen pheromone alcohol tincture (last year I began keeping all my dead queens in a jar with a little bit of alcohol). Almost 24 hours later, the swarm moved into the lure hive.
Awesome. And thanks to Michael Bush for the tips.