With a group of 7, you will either need to call UberXL which can be few and far between, or you will need to split your party up into two separate Ubers. I just did a check on the Uber app, and right now, the only Uber available is UberSELECT which is a luxury vehicle (Mercedes, BMW, etc) and they are estimating $87-$115 to Aulani and also a 20 minute wait for pick up. You'd need two of those for 7 people. Doesn't sound like Uber is a great option from the HNL airport.