Yes! Most hotel bookings are refundable provided that you cancel before the accommodation's cancellation deadline, which is usually within 24-48 hours of check in. If you booked a non-refundable reservation, you might be able to still cancel and be given a refund within a 24-hour period of booking. Add dates, click "Search", then filter by "fully refundable" to get top deals close to Mauna Loa.