Welcome Starheliomos.
I have to agree with Monkey... outside of the main camps things don't seem very different from days of old.
I guess it all depends on what and how long you go for. If, like me, you are able only to spare enough time to go in and out quickly then, as Monkey suggests, just turn up and enjoy.
If on the other hand you are going for a longer period and are more interested in listening to other people's music, fighting off thieves and nurturing a hang-over then one of the official campsites may be a better bet... not my cup of tea.