In 2002, I was fortunate enough to be called to remove a swarm of honey bees from the football stadium of the Jackson Indians. They landed on the center cross beam of the uprights in the end zone.
By brushing them off (gently) into a cardboard box, I was able to transfer this swarm from the goal post to a normal bee hive.
Not a large swarm, but large enough to scare the grounds crew who wanted to mow the football stadium turf.
My approach was to gently brush the bees off the goal post and hope they'll go into the box. Once the queen falls into the box, the rest of the swarm will follow. I used a piece of poster board to deflect falling bees into the box.
Swarms are usually quite gentle. Unless you really upset them, they won't sting you.