First timer here. What to expect?

Just went to Pemberton Fest a few weeks ago and now Squamish is just a week away. Wondering what is unique about Squamish that would be handy to know beforehand. How strict is security? How strict are they on the 4 people/campsite? How much are beers and how many can you bring yourself etc etc. Any tips and tricks appreciated. Hope to see some of you in a week!