No one knows just yet. The Parks Blog has not done an official blog about this event yet -- instead they focused on the Jungle Cruise breakfast today. Apparently they are not doing a blog about it until next week, a couple of days after Labor Day.
My guess is that Dr. Facilier may end up being limited at MHP outside of this specific event. To me it seems that having an 'exclusive' character at the Blue Bayou would be one of the selling points. If I were going to plunk down $150 in addition to the money I already plunked down for MHP, I would want to mingle with a character that was not going to be out and about at the regular MHP. He may still be at MHP but just not as often.
I guess we have to see what the Parks Blog says when they finally do a piece on it next week! Hopefully they will have their information correct, as the
Disneyland press releases can't even get it straight whether or not there will be a Monsters U dance party in Tomorrowland or a Superhero dance party!