Here are some tips for swarm traps. Although I don't put all mine so high in the tree. :-D
10 things to consider for swarm trap success
* prefer a swarm trap (colony location) about 8 to 15 feet off the ground.
* will disregard a trap with light coming in from above.
* prefer a trap equivalent to a cavity size slightly larger than a deep brood
* will select sites in the afternoon shade. They may abandon a site within a
few days if in full sun and heat is an issue.
* prefer bait hives with entrances facing south.
* prefer a entrance towards the bottom of the cavity.
* prefer a unobstructed flight path from the entrance.
* will not take up residence in a bait hive that has other insects in them.
Keep them free of wasps, yellow jackets, etc.
* prefer a bait hive that is dry.
* prefer a previously used site that has a honey bee smell of old comb, or
one that has baited with bee scent.
While swarms have been known to go as far as two feet to the empty hive sitting next to the hive that issued the swarm, tests have also shown that if bees had identical swarm traps to choose from spaced every 100 meters, they will go about 900 meters on average. But distance is greatly dictated by housing availability.