Hey guys

I've tried to understand from the other topics and the HA website, but I can't get a clear answer... I figure experience will perhaps give me the best answer.

I'm flying from KOA-HNL-EWR on 1 ticket (booked UA.com). KOA-HNL is on HA in Y, and HNL-EWR on UA in F.

My bags are usually over 50lbs (I had to pay $50 on HA in F from JFK-HNL this year for it being 52lbs..), so I'm trying to figure the best option.

Will HA charge me the inter island bag fare ($17) or the mainland bag fare ($25+)? Any other tips?