There have been a couple of contributions regarding tee times at my club becoming difficult to obtain.
1. Tee times were spaced out to 12 minute intervals.
2. Many members have been out of work, families with kids are out of school and the addition of new members.
3. Tee sheet has been filling up with advanced reservations (2 - weeks in advance)
On a good note, intervals returned to 10 minutes and longer daylight allow for more play.