Don't give up! I have been looking for about a month for availability for tours during our mid-July trip. I had almost given up hope because there was no availability for any of the days during the whole week we are there, but today I just checked again and there was availability for all times open. Yay!! I have been wanting to do this tour forever but my son wasn't old enough on any of our pre-covid trips and it wasn't offered during our last two trips. He is finally old enough and we are going to get to do the tour before he goes off to college!