The best way to see the whole island! We had it for a week and slept by the ocean every night, with the sound of the waves lulling us to sleep. While there is no bathroom, there are dozens of beach parks all around Oahu that have accessible bathrooms and showers. The van is stocked with all the essentials — toiletries, eating utensils, towels, etc.
As for places to stay, there are plenty of parking lots, pull off areas, and beach parks where you’re fine to stay. Some will say you can’t, but it’s not really enforced from our experience. We slept in a different spot each night, waking up to a new ocean view. Can’t get that in any hotel!
Jarrod and Ana were great hosts! They were very responsive with questions we had about the van both before and during our trip. The drive up to their house is beautiful, too.