Alright freshie, sit down and listen.
I would suggest bringing everything you need and making sure it can fit in a backpack or several. Or in the most optimal case, have a friend who ain't going to the game or camping to pull up and shove it all in their car. There is an outside outlet by the stairs and sometimes they are mad about you using it, other times they don't care. If you're gonna bring an extension cord, BRING A FREAKING POWER STRIP.
If they have a security guard there, they will let you leave to use the bathroom and that is about it. They'll send you to the back if you're doing something else. Though some security guards don't care. Befriend them if you're in the front.
Tent would be useful. You can rent one from State Gym for like $5 a day or something like that. That is what I did because I wanted my own personal tent when I was waiting with friends.
For food, someone will probably buy you food one way or the other. One time it was Pollard, another it was Rhoads (for a football game), another it was Hoiberg, another was some random on here. Otherwise, delivery places are your friend. BRING A TRASHBAG FOR YOUR ****. DON'T LITTER. IT IS ANNOYING TO SEE PEOPLE LITTER AND IT'S DISRESPECTFUL.
Alcohol, I suggest being sneaky, over the age of 21, and smaller bottles for concealment purposes. You can figure this out for yourself.
Bring cards or something to do that doesn't require electricity. You'll need it.