Don't stress the mooring ball issues. Even at 3-4pm, going by Cooper or others, you may find a ball opening up if you did not happen to snag a 0700 BoatyBall (or preferred to not try). Just keep enough daylight so that you can go to alternate location for mooring or anchor. (Cooper has virtually no room remaining for anchoring).

Th BoatyBall Debate has lots of chatter that may make it seem that you must be on a mooring by noon, but it is rare that I am on a mooring before 3-4pm (or the pointy thing on front of boat, which I like more than actually picking up a mooring).