Yes - camping tickets are £5 a night at the gate. If you arrive late they'll assume that you're camping and charge you for it. Once you're in though you'll be fine.
Facilities are ok - there's a couple of toilet blocks and a shower block (open showers) there as well.
The on-site cafe/bar is ok but it's normally not open in the evenings.
I'd rather die peacefully in my sleep like my Grandfather, than screaming in terror like his passengers.- Jim Harkins