Thanks all for the advice, although now going to have to pray my trolley holds up based on feedback.
Going back and forth with friends regarding the best time to arrive by train, they want to arrive around 10AM to get a better spot but I'm in favour of around 3PM to miss the worst of the queues for the shuttlebus and getting into the festival.
I have a feeling that even if you get there at 10AM, with all the queues, you wont be getting into the festival until 2PM and therefore most of the good camping spots will be gone anyway, so you might as well leave later to spare the waiting around.
Would be good to know peoples thoughts here?