Our camper van experience was the highlight of our stay on Oahu! It felt comfortable and safe for us 2 girls traveling and we were very impressed by the parking locations recommended. If you want something even safer & easier, I’d suggest booking a vehicle campsite (V5 is best) at Malaekahana Beach Campground. It’s totally not needed, but nice to have a campfire and toilets + outdoor sink/shower. Everything went smoothly, just keep in mind that the van pickup is 20-30 min drive from the airport ($30+ each way with Uber)