If you want better options, think about staying farther away or take advantage of any of the 10 million posts and ideas Jen has taken her time to gather, create, and post on nearly every social media forum known to man and machine. You knew the price, you booked the hotel, if it's not in your budget it's your own damn fault for poor planning. The options are there and they're well publicized, and it looks like you're just complaining because you're not getting what you want.
Unforseen charges like this "incidental" shit and the constant flubbing of reservations suck, but you'd think people would either come to know what to expect or just stop patronizing the hotel. Seriously guys this silly shit happens every year with this hotel and every year the same group is crying foul and rushing to make new reservations. 10 years later, you should probably shut up or move to a different place. Cancel your reservation, dispute the charge, and find somewhere else to stay this year and next, and however long this festival's promoter determines it's still worth it to put on a show.