No we are definately granted some sort of powers otherwise we would not be able to see many things in the Wizarding World or be allowed into Hogwarts or have any use for wands. The entire backstory of the island seems to be that the wizarding world has been revealed to muggles. This is also stated on the site. I am willing to put money that the spell limits will play in part something all muggles entering should keep in mind.
Well, what is done is done. I cannot turn back the clock. Spoiler's is spoiled. The funny thing is... someone posted the most MOST telling picture here months ago. It was very simple, yet 99.9% of you ignored it as a guess. It wasn't. I presume the lawyers had not yet caught on to this website when it was posted. It is such a hoot that I grabbed on and yanked the "you know what" out of it and pursued the original poster.
So, I am about to post this as a quick reply... am I still here???
The Wizarding World is set to be sometime around the fourth and fifth book, based on the theming.
Here is an interesting question, how many people in costume show up on day 1?
It will be interesting to see what their stance is. They let in kids with superhero costumes and princess costumes though no costumes are allowed for HHN. I've seen kids and adults in the park with the glasses and hats and capes, but that doesn't mean they had them on when they walked in the gate. They may have waited to put stuff on. June 18th isn't far!