There are almost 10 million visitors to Hawaii each year. July is a high season. If you plan to attend the conference, you should book an accommodation as early as possible. Courtyard Marriott Waikiki Beach Hotel offers a very good conference room rate. If you are interested, you can make the reservation directly on the hotel link.  Chaminade University has on-campus dormitory for rent. The prices are very good. 

Courtyard Marriott Waikiki Beach

Courtyard by Marriott Waikiki Beach is located in the heart of Waikiki, a short walk from Waikiki Beach and near to several top attractions in Honolulu, including the nearby Honolulu Zoo. Courtyard Waikiki Beach Hotel provide the conference attendees with a very good conference room rate. They will honor it between July 13-19.  

On-campus Dormitory of Chaminade University

It is during the summer break while the conference takes place. You can choose to stay at the on-campus dormitory of Chaminade University. Kindly note that the dorm rooms do not have air conditioners in them. Attendees would need to do ride share (Uber or Lyft/taxi) to get to places off campus. The prices are listed below
Double occupancy: $55 per day (shared bathroom)
Single occupancy: $80 per day (shared bathroom)
There is a one-time $50 cleaning fee per person.