We had a great time going around the island with the van! The size of it can be overwhelming at first if you are not familiar with driving large vehicles, but it was not too difficult to get used to. The backup camera is key!
We would recommend it to anyone visiting Oahu. We far preferred our island van tour over staying in the Waikiki area! Check Hip Camp and Malaekahana for campsites, and confirm your rental vehicle insurance before booking, as AirBnB does have different rules around booking vehicles.