Then search for weekend music festivals, which are usually longer than a weekend. Not Coachella because I hear that ones been enshittified, but like Coachella except good.

The longest one I know runs for 6 days, Wednesday to Monday. Not everyone stays there the whole time. It's awesome. Although the more awesome one I know was Thursday night to Monday morning.

Do try to stay for the last night. At least here in Europe, the crowd who doesn't go home on Sunday night is the most interesting crowd.

And? Back in the day people used to regularly go from northern California to southern and vice versa for a good party

By people I mean me, I'm sure some people are still doing it