I went out this weekend to explore fishing at depot harbor. It was my first time going there, got my 1 day fishing permit costed $10 at 6:45am from the office situated at the start of bridge. The staff was very nice and friendly.
Around 7:00 am I started fishing, and tried Pautzke salmon eggs. I was not been able to catch any rainbow but hooked a massive pike using Pautzke salmon egg around 8:30 am, the pike was too big to fit in my medium size net, and was around 45 inch long. I tried couple of spots at pier but no luck until 11:00 am and I decided to call it day.
I believe that relying solely on escaped fish from nearby cages is not a good idea because, first of all you don't know if any fish really has escaped and how many escaped or even the escaped fish is still in this area. At least, I didn't see any rainbow near by that would have escaped from cage, probably, they have improved the cages quality over last few years. I will give a try again around December or January/march and will post an update.
Cheers
SJ