Did it last week and probably this week with wife.
You can eat and drink at your choice of restaurants or bars nearby while watching other games on tv then catch the shuttle.
Pricey but lazy man's way.
$5 parking in High Street lot, bar $$ prices for food and drink, and $15 pp round trip shuttle ticket.
Can you tailgate or is it just bars and stuff?
Don't know. I have never tried or seen anyone doing so. I would guess they would discourage it, if not prohibit to encourage patronage of the local merchants.