I was there Saturday... several others from my hunting party hunt there all week.
Yes, you must sign up within an hour or so of registration opening to get all the hunts you want. We have 1 designated person that signs up the entire group. He does a fantastic job at it. This year our group accounted for over 25% of the hunts sold at Glendale. It also marks the 50th year in a row that the group has been hunting at Glendale.