Recently, Universal made it possible for fans to pre-order passes into Universal's theme park, and the HP section itself. According to Universal's website, 4 day passes cost $285 apeice for adults, and $130 per child.
The passes come with benefits within the HP park too. The four day passes lets visitors have breakfast at the Three Broomsticks at no cost, rest at a hotel within the park, and discounts on food and drink at the park.
While the passes are expensive to purchase, they certainly provide a great deal of benefits.