Safety Knights

I had similar swarms here in southern AZ. we were told that the queen and crew would stay a few days and leave. according to a local bee guy this isn't unusual when the queen is tired and rests before moving on. they stayed about 5 days and were gone. we just left the tree and area around it alone.

That’s huge!!! Are flamethrowers legal in Tahoe?

If you have any beekeepers in the area give them a call. Many will come out and retrieve the bees. They normally swarm when the hive gets too big. Then the extra queen and her minions fly the coop for other quarters. A buddy of mine has hives and I've helped him with them a few times. A lot of beekeepers are grateful for the call about a swarm as it is free bees to them.

Once several years ago I was leaving work late one afternoon. There use to be a picnic tables outside the Employee Entrance to the plant. As I walked out the door, I heard a second shift female PIT Operator from our Shipping Department call me over to her table. So I walked over and said, "Hi Debbie! How is break going? You having a good shift?"
She replied, "I am good Fitz! Look up at the corner of the building!" As I did I saw a hornet fly by and followed it up to the corner of the building where I saw a full nest. With hornets coming and going left and right! They were about 15' above the picnic tables.
Deb saw me looking and said, "When you come back to work in the morning can you tale care of those!"
I replied, "I will do one better I will go back in and call Greg (the 2nd shift Maintenance Leader) and see if they can take care of it now. I now they have some great hornet, bee, and wasp spray and long poles just for this kind of thing!"
She opens her lunchbox t reveal and "eppey pen" and says, "Yeah this is my favorite place to take a break and I only have one of these!"
I am shocked but recover and say, "Are you allergic to bees and hornets?"
Deb replies, "Extremely so! I have almost died a couple times. The first time was as a kid my brother and I got into a nest of those!" And she points up!
In my calm unpassionate way, I yelled. "What the Hel_ are you dong Deb?!!!!!! Get as far aways as you can right now! I am not arguing over this MOVE now!" In truth I am a very passionate Irishman and was raised in a Foundry! I am not known for a quiet demeanor!
Deb slinked away mumbling a few words I chose not to "hear".
The next afternoon I sought her out. "I am sorry for getting upset yesterday but what you did is very dangerous! You just cannot take risks like that! You are tempting fate!"
She started to cry so I took her to my office. She told me that she had made up her mind to not run and face her fears.

I think its been covered but yeah, either someone needs to go in and find the queen and then put her in a hive and they will follow her. Or just give em time and they will move on until they find a hive location. The caveat being, is there anything in your area that would make a good hive? Because if they find it, that may be where they chose to stay for the season.

The bees stayed for 5 days. When I finally was able to contact a local beekeeper, the bees decided to leave before the beekeeper could arrive.