Originally Posted by Yoshi212

You're going to want to review the promotion again. From what I've seen the "$300" is not a discount but rather spending credits towards select island cultural experiences. You have to book using the specific site, discount code for a stay at one of their specific hotels to qualify for the promotional spending credits.
I believe airfare isn't part of the package so you can use UR points to for the flights, availability required, or o reduce the cost of such flights.