Practical Information

First things first, Hawaii is EXPENSIVE. Almost all items you purchase on Maui has to be brought in. This includes food, very little of which is grown locally. Prices on nearly everything are going to be higher than on the Mainland. A friend of this editor has termed this the "paradise tax." Don't buy something on Maui that you can get cheaper back home.

To save money that might be spent eating out, stay somewhere with a kitchen and cook your own food.

It's worth noting that even store bought goods will run you more here in the islands.   Meats and Dairy products in particular are often  twice, or even three times the cost of the same goods back on the mainland.

Hitchhiking

In most of the U.S., there is a strong stigma attached to hitchhiking. It is considered by many to be dangerous and foolish to ride with or give a ride to a stranger. Not so on Maui. It is prevalent on the island and with the low crime rate, there is seemingly little danger. But this editor urges extreme caution before one decides to go that route. You just never know.

Note you can get arrested for hitchiking.

Supplies

I know many people who come to Maui stay in condos with kitchens and sometimes theres just not enough money or time to get a nice bite to eat every day; especially on those long excursions to Hana. There is a Costco near the airport which i highly recommend making ur first stop. Also its a good last stop as it contains a lot of hawaiian goods that you can bring back home. For example: huge boxes of Mauna Loa chocolates prepackaged in travel cases (like 6 normal size boxes in one).