A little effort at the language can go a long way! When I first arrived at the island, I made a game out of pronouncing the names of streets before I passed them. If you're traveling around the island in a Campervan with a partner, make a game out of it to see who can correctly pronounce street names first.
Here are 12 (twelve) words to get you started before you arrive.
Aloha - a greeting that means love and friendship
Mahalo - thank you
A Hui Hou - until we meet again
Howzit - how are you?
Honu - Sea Turtle
Kama aina - "child of the land" - refers to someone who lives on the island
Ohana - family
Lilikoi - passionfruit
Haole - a foreigner or white person (can be both derogative and playful)
Makai - towards the water
Mauka - towards the mountain
Pau - finished, all gone
For learning more Hawai'ian, I recommend joining Duolingo!