I have never been to Universal, but have some time as part of a conference in the area next week (9/22). I am planning to enter the park around 1pm and am mostly interested in the Harry Potter areas. This also happens to be a HHN evening, but I wouldn't be interested in any of the houses/shows/etc. A HHN ticket is much cheaper than the 2 park ticket I was looking at previously, but would I be able to experience Harry Potter like I would during the day? If not going the HHN route, is 4 hours enough in Universal Studios before switching to IoA? My date and time are fixed, so trying to maximize park time and minimize the budget!