John, how ingenious
My thoughts for Wendy -
It seems like swarming is pretty predictable in your area, so I would try to lure them when they are scouting, and not wait to try and wrangle them up after they have swarmed way up in a tree. You can buy swarm traps,
but an old nuke box works just as well, if not better. It seems that if bees where in it once before, scouting bees seem to think "if it was good enough for them, its good enough for us".
Take the lure box and mount it up in a tree about 10ft off the ground. The more boxes you put out the better your chances. Putting an old piece of comb in helps too. Just be careful with the wax moths. An old piece of honey comb that never had any brood in it won't be bothered by wax moths. You can also buy swarm lure for <$10 that seem to work reasonably well. Some folks even make their own lure. When they requeen their hives, they drop the old queens in a jar of alcohol, then blend the whole mixture up and put some in each lore box. Yet other claim lemon grass oil has the same affects. Just keep an eye on the lure boxes and periodically clean out the spiders/wasps and other bugs that have moved in.