We’re glad we tried, but personally didn’t end up loving the van experience in Kauai. You need a specific campsite to stay the night in a given location. Sand would easily get in the van from our campsite/beach visits. It rained a lot when we were there, and a lot of our stuff in the van got wet and muggy. Also not sure how much cheaper it ended up being vs. getting a regular rental car and straight camping/doing a fixed airbnb.