Wow! I'm so sorry.
I found this on their website: Reservation Policy
(It's at the very bottom of the main page, at the far right.)
Due to our limited staff, facilities, and resources, we are unable to manipulate the reservations that we receive as requested. Therefore, there will be no refund or credit for rooms that are cancelled. Please understand that to make rooms available to guests we have to enforce a strict cancellation policy, and by reserving a room you are accepting the stated terms. (No exceptions). This sounds draconian but when a room is booked, it is no longer available to others that could use the room, and every night during the months of June, July and August we are full every night and turn away hikers coming off the trails. Reservations are a service for travelers and hikers and more than 90% book and meet the conditions of the reservation. Please do not book until you have confirmed with your group or others and they also understand these conditions, as in the past this has caused leaders to cancel a room or beds.
I'd try an ad on Craigslist.