The two week thing was in the script in '99 as an alternate opening if there was a delay at the load dock.So...yeah...by the way, it was never, to my knowledge, *officially* a two-week safari. All of the posters in the village refer to "day trips." As far as I know, it's something that evolved among the drivers. It's certainly not in the current script or Operating Guide (though 99% of the drivers say it).
As for the radio music thing, if there's a backup at Tilting Bridge, the music can go on for a while. It does eventually fade out on its own after about 3 minutes or so.
How many trucks do they have now? How many are usually concurrently on the ride path during the busy times?