As for standing and crowds and stuff - Em, darling, you're built like a viking warrior, and you know I mean that in a positive way. Most of these fans are what, 16 year old emo girls weighing in at 50 kg? A nice pair of steel-tipped boots and you wouldn't have much trouble, :-)

Still, I'd definitely have chosen seats too. It's way more comfortable to be able to sit in peace.