Paul,
Since PB doesn't have returning nines and the 9th green is far removed from the clubhouse, the last tee off time of the day is probably challenged by the setting sun.
I'm sure that many golfers, teeing off late in the day, never complete their rounds and that tee off times are adjusted as the calendar approaches and retreats from June 21.
If the last tee off time is 3:00 and play deteriorates beyond 5:00 at this time of year the later groups will be playing in diminished light and darkness, especially if clouds or fog moves in.
So wouldn't it seem practical to perform maintenance after 3:00 pm when the course clears of play ?
To me it would seem prudent to groom bunkers and mow greens by essentially following the last group to tee off.
And, in conjunction with those practices, to encourage those teeing off early to play in 3:30.
Remember, most are playing in carts or with caddies or both
Our caddy told us that they've increased their caddy ranks dramatically and that they increased the number of maintenance personnel, but I don't know how accurate his information is.
That would enable them to reserve "speed slots" for the first hour.
More clubs are adopting "speed slots" for their younger members.
This would enable PB to accommodate more golfers, ergo more revenue, and it would provide a more pleasant golf experience for those playing The course. Everyone wins.
Perhaps there are reasons why an emphasis can't be placed on afternoon maintenance, but I can't think of any off hand.