I'm sure you aware of all the regs and rolling closures seeing that you have a federal permit (which is no longer available). I used to fish for Cod in the bay, when I lived in MA.
I never had much luck on (or inside) stellwagen . . . I've been told that the fish are outside of stellwagen from June - Sept . . . and will move inside Oct/Nov - May
Once you get your seacraft, use this chart and your fishfinder (around the drops). You'll should have no trouble catching your limit.
http://pubs.usgs.gov/of/of00-410/pdf/pseudo.pdf
(this is part of a series of USGS charts. . . It's an 8mb download. Beware if you have dialup.)
http://pubs.usgs.gov/of/of00-410/
If you buy the printed charts ($5/ea) each quardrent is poster size (all the charts taped together will easily cover an entire wall) That's a lot of detail.
