hawaii is very far away....keep that in mind..
really really far...
aulani is just a resort...albeit a disney resort, but a resort just the same..
if you want to get disney theme park time in, then i suggest stopping in
disneyland either on the way there or on the way back...
probably best if it's on the way there...
again, hawaii is really far away...really..
i suggest you do a good bit of research before you commit..
look up aulani to see what it is..
look at the distances and travel times..
if it were me, i'd fly to LA, spend 4 days to a week in disneyland/disney's california adventure
then continue on to aulani for another week..
then make that devastatingly long trek back to the UK...and it is far...i'm not exaggerating...(of course, i'm 5 hours further than you are, but even to the UK it's far)...
on the other hand, hawaii is a magnificent place...paradise is not overstating it...
if i could live there i would!...
.