Pre-booking FP+ question :)

[anniebabymu]

I don't know if anyone will have the answer to this or if it is even the right place to ask this, but friends of ours were planning to stay off-site have now booked a room at Pop with us thanks to a Florida resident discount. They also got a special on tickets, so they turned it into a 3 day package. I know I can go into my MDEx and pre-book their FP+, but I think (hoping not!) that it may be more complicated than that. These tickets have a Magic Kingdom blackout date of May 24th and that's our MK day with them. They plan on upgrading to AP's at the park before entering so they'll be able to get in.

So here are my questions...

1. Since they have a room reservation too, will I be able to pre-book MK FP+ for them for May 24th or since it's a blackout date will it prevent me from doing so? 2. If I am able to pre-book FP+ for them for all of their days with us, will upgrading to AP's screw with the FP+ I have made for them before upgrading?

Thanks in advance!!