Swarms are not as bad as disturbing a nest. They don’t have a bunch of work and energy to defend so they are more tame.
When moving a swarm, it is helpful to first give it a good spraying of sugar water.
In a pinch, in a ball park, coca cola would do
Swarms are usually very docile. I have handled them with my bare hands. It is a very strange sensation holding thousands of bees in your hands. They feel “dry” if that makes any sense.
You want to be careful not to crush one and you don’t want them crawling up your pants leg. They’ll keep going up until there’s no more room to crawl, if they panic or get pinched by the material, they’ll likely sting—often near a tender bit.