Yeah, I've had to do similar so far.
Last year I picked up a swarm in a school playground early in the morning. I got a call a few hours later saying there were still bees there and they were aggressive, and I checked it out, and there was still a fist-sized knot of bees and they were looping in big circles and banging into people. Nobody got stung but who wants crazy bees on the playground? I ended up killing the remainder.
I'm concerned about it because I got two calls today from businesses, one a huge glass hotel downtown and one a restaurant, neither is an option right now of leaving a nuc behind, and there are a lot of people passing by (I'm assuming). (I'm not getting either swarm, but I will probably face the issue sooner)
Rick