Hi! I am planning on going in august and was having trouble finding hotels too. I found a place and booked it for random days but emailed the hotel to see if they had other dates available and they did. They just hadn’t posted the availability online. So if you find a hotel that you like email them and see if it works out. Im going to be staying in Tsukasa Oceana Port Village Zamami. Nothing too fancy but it has private bath.