I guess my family is just going to have to plan our vacation at the last minute. We'd like to avoid the crowds that are sure to follow June 18th, but there is no way I'm going before -- unless we are 100% sure it'll be open to everyone.
My instincts tells me that soft openings
should be open to everyone in June -- not just the people who have the Potter Packages. However, I bet the rides will be on and off frequently during this time, while the package holders will get to tour Hogsmeade no matter what (considering they are promised breakfast in The Three Broomsticks).
Basically, there are 3 scenarios (first hour being solely for Potter packages no matter what, I assume):
1) Gates are open to everyone. Forbidden Journey -- when running -- is open to everyone.
2) Gates are open to everyone. Forbidden Journey -- when running -- is only open to Potter package people (ohhhh I would just die a little bit inside if I was there and saw others riding but couldn't ride myself! -- which totally happened to me at Epcot right before Mission: Space opened).
3) Gates are closed. Only Potter package people are allowed in the entire area, and, therefore, I don't give a flying **** whether or not Forbidden Journey is running

(no offense to anyone who
does have that package -- you lucky dogs).
Sinister #4 that will never, ever exist (yet people keep mentioning): All of IOA is only open to Potter package people. Seriously, this is ridiculous. It's not going to happen. Stop mentioning it.