Originally the camping was at a separate site, but the campfire piss ups became more of an event than CSF, so it was all combined to make it more of a festival atmosphere, hence the name.
I get that people want to be comfy and well rested on what is essentially a weekend holiday, but with less people camping it's in danger of going back to a single day event where everyone has to book a hotel for one or two nights.
I also think age has a lot to do with it, the clubs been around for a quarter of a century and we've all got older and less tolerant of discomfort.