You're planning it all wrong.
You set off at 6am to avoid the traffic and arrive in good time, and head straight for the Hellfire Mods queue.
An hour later, when you've reached the front and they've sold out, you head for the POTV tent where you spend the rest of the day, punctuated by sprints to various vendor's tents as apes come in with tales of ridiculous bargains they've discovered.
At 7pm, when Hedley and Toby throw you out, the traffic will have died down and you set off home.
What better way to spend a day?