Have been fishing Quinsig for years, off and on and when we need to run the boat and get the carbon out. Some decent fish south of the bridge on the right hand side all the way to the old Roys Marina, that point right out there and the weed bed after it.
If you cross the lake at that point and fish the Shrewsbury Police boat house there are always some fish there and south of that.
Favorite lures ???, jigs, grubs, tubes and rattle traps and spinnerbaits.
If you continue south around the islands, some smallies and largies near the town line marker and early in the year or just at dark, there is a hump near an island as you head towards the bridge to get to Flagg Pond. Lots of lily pads back in that section for frog baits. Find cabbage beds and fish them hard, out on the main lake.
There is also some fish in the last cove at the left, at the end of the lake , near RT 20, its deep but there seems to be some fish there.
I do agree that the fishing is poor up there. Lots of deep water of course and the fish get hammered with high speed boating. However, I have been out there once in a while at 5am and gotten nothing.
As far as Whitehall , I live across the street, it gets hammered too, all the time, fish the "floating islands" black spinnerbaits can produce, dark colored topwater, sometimes. Plastics of course. There are some good stump fields just out of the boat ramp on the right and left.
The shoreline all the way to the point as you come out of the launch ramp.
I have to say I don't fish it often, as I would rather fish at Quabbin, however when I do fish there after the spring, I try to go at 5am when there are few boats on the water.
As far as fish, there are some very nice, big fish. I saw a 9.5 taken in Oct of 07. My fishing partner has taken two 6lb fish. So they are there but often use the floating islands for cover.
As you turn right out of the ramp cove there is a lot of sand and gravel, with some very large nests , I got a 5.2 largie last year on a stump, that had been moved in there by the ice during the winter.
Those fish that have spawned there have to make there home with in 500yds from there.
Of course the weeds don't help the fishing either. Lots of them. Some new trees down the deep end at the south end of the lake.
Hope this helps. MJEFF