Keep in mind, its also Memorial Week.
I'd think that it could be wise to open up the area, but not open the ride just yet. You can have themed TMs on stand-by at the entrance, saying that expeditions have not started yet; but they can enjoy the area until a further date. That way, it gives more footspace for them this weekend, while teasing the opening of Kong (which I have to imagine that Fallon will moderate the King Kong special, with the opening date revealed then).
It also makes me wonder when we'll see the USA Today article, if its tomorrow (as the contest ends tonight I believe) or the day after the airing of the special presentation of Skull Island: Reign of Kong.