Can you imagine traveling to an exotic destination and upon arrival realize you left something important at home. I have been leading groups for a long time and can tell you that about 15 percent of people forget something.
Maui, is a tropical paradise, but it does not have a sophisticated camera store, so if you forget something important you might be out of luck. The good news is it does not have to be that way.
The best way to prevent problems like this is to make make a list of everything needed. Then assemble everything and pack it before travel. This process ensures you have everything needed.
This process provides peace of mind, and that means less stress.