FEMA recommends having a prepackaged kit of supplies you can grab when a storm threatens. Click here for instructions. On the mainland USA, the recommend having 3 days supply. In more isolated areas like Hawaii they recommend 5 days supply.
Realistically in Hawaii, it will take a minimum of 15 days get relief supplies to Hawaii. I recommend having supplies to care for your family for at least a month. Google “emergency food supply hawaii” to find resources you can buy in Hawaii.
Take the Go Kit to the shelter with supplies for 3 days. What you bring to a shelter must fit under your cot. When a severe storm threatens, store you emergency supplies in your car. Your home may be destroyed and everything in it scattered. At least when you find your car, you will have what you need to survive.
A couple of things I don’t see recommended for your Go Kit I think are important are a portable water filter bottle and a set of Walkie Talkies. Water and Communications will be the most important factors in rescue and survival.
Organize you neighborhood. Know who needs special help and who has special skills. Test your emergency communications. Use NextDoor.com to help you organize you neighbors.