“My car can go 450 miles per hour 0-60 in 1.7 seconds”
Well cool story bro but the speed limit is still 65. LoRa is an amazing technology for exactly what you describe but festivals are basically “I have very little line of sight but a fuckton of devices.”
This leads to two different solutions, high bandwidth short wave communication bouncing between everyone, and putting towers above everyone which is what cell companies do. Ground to ground LoRa is neat but not necessarily better.