Moderator, Marriott Bonvoy & FlyerTalk Evangelist
Join Date: Oct 2002
Location: McKinney, TX, USA
Programs: United Silver; AA Plat/2MM; Marriott LT Titanium; Hilton Gold
Posts: 11,728
I'm assuming that a USAir ticket to Hawaii is 35K per person and that you already have 140K (since you mentioned that you already have the points for 4 tickets.) Which also means you still need another 140K miles to get the other 4 tickets. You also need a minimum of 2 rooms since you have 8 people.
So with that you could order two Travel Packages each which include 70K miles. This would cost 440K Marriott points. Of course if you want/need more USAir points, you can up your two Travel Packages to include more points.