Difficult to tell what will happen. Agree with earlier post that you'll get a lot of "I got", "I didn't get". Bottom line: all doesn't mean anything until you get to that HAL ticket counter and they tell you what will happen.

Before my trip, I wrote to Delta and got a written response that it was covered. I also tweeted Delta and got another written response, same thing, covered since it is a DL coded flight. Got to Hawaiian Airlines and they
charged me. I showed them the written word from Delta, didn't mean a thing to them. I asked for a supervisor, got her name, even had someone on the Diamond line from Delta, and...bottom line, if you want to get on that plane, you pay the baggage fees.

So, be prepared for whatever happens, but I strongly suggest you get something in writing from Delta so you can at least get a receipt from Hawaiian Airlines and send it to Delta looking for that reimbursement. Hopefully, you won't get charged, but one never knows.

Good luck!