If Aulani is your home resort then availability may not be an issue for July. But if it is not, you may struggle to find a week in July at the 7-month mark for the type of room you want/need/have enough points for. I just looked and there are already some options unavailable the first week of July, 2018. Granted, there are still a number of options available, but as it gets closer to the 7-month window, you may find you have very little to choose from. As just one example, right now there are only 6 dates in May unavailable for a Standard Studio, yet there are 18 days already unavailable in June and 2 days the first week in July. We were there the last 2 weeks in May and had a number of options available when we booked our trip at the 7-month mark. Again, there are a lot of variables to consider as already noted, but availability may end up being the thing that makes the decision for you.