My husband and I rented a caRVee for over two weeks as we explored the Big Island. It was an absolutely incredible experience, and the perfect way to travel around the island!

The car is stocked with everything we could possibly need - beach mats, towels, snorkel gear, hammock, sunscreen, you name it! For a budget traveler to Hawaii, we especially loved being able to cook many of our meals using the cook stove and kitchen supplies provided. Josh and Paula were also outstanding hosts - quick to reply to any questions and willing to help us out in any way!
There are a wide variety of campgrounds around the island that you can stay at if you want amenities like bathrooms, showers, and sinks. The car does have a compostable toilet, solar shower, and washing basin if not. Our two favorite campgrounds were Kohanaiki (aka Pine Trees Surfing Beach) and Ho'okena Beach. Josh provides a list of recommended campgrounds, and it's easy to book these online. I would just recommend booking the campgrounds early if you can, because the good ones often book up early, especially on weekends.