Traveling to Hawaii with cartridges, connecting flight in Maui to Kauai

I'm headed to Kauai in a week and I need to plan out how I'm going to bring cartridges. Before I've vacuum sealed a half oz and threw it in my carry on but we had a direct flight to Maui with no connecting flights. This time I have a connecting flight in Maui to take me to Kauai. My concern is whether they would check my bags again in Maui before my luggage/carry on gets on the plane to Kauai and whether I should put it in my carry on or my checked bag?

Anyone ever have a connecting flight in Maui that might be able to help me out a little?
Also would it be safer or more sketchy to mail it to my hotel?

Still looking for any insight I can't get on the connecting flight in Maui to Kauai and whether it would be a bad idea to bring cartridges in my carry on