Yes, the second outing did have more hits near the surface. A smaller jet diver, and a floating line / bead head bugger. Fish on the bugger was by casting with slow spastic retreival. We did catch one while slowly paddling to dock.Excellent report; welcome to OFF.
Hagg is one of my favorite places. My avatar pic was taken several years ago from the parking lot, at Ramp A. The moon was setting prior to sunrise. I only wish that I would've had a better phone or camera back then.
When "trolling" Woolly Buggers, or any fly for that matter, think of sitting in a float tube and making two very slow kicks. Then drifting a bit. Then a couple of slow kicks. That's the speed you want. Slow and steady is the ticket.
Perhaps you slowed your speed down, on your second outing? Which resulted in catching fish. Also try Olive Green and/or Brown Buggers. The same colors in Teeny Nymphs are also good IMO.
Maybe also try an intermediate fly line, instead of a sinking line. The water is cooling down and the fish may now be in the top 10' of the surface. If you have more than one reel--with different lines--you could easily switch, to see what will entice a bite.
Good luck and tight lines, TD