Sorry that i didn't reply sooner ! ! 1
Since you are from New hampshire and you must launch from there try Ipswich bay. And if you had towards Mass. try trolling in 30 fathoms. or a mile off the shore.I haven't been to the Isle of Shoals but you could try out that way.
If you are trailering your boat to Mass. and going to be around Gloucester or Rockport I would launch at Granite pier in Rockport. From there you could be fishing the bay in minutes; on the beginning of Jeffery's ledge in 15 minutes and off of Thatchers & Gloucester in 15 minutes.
You don't have to be down deep. I use deep running Repala's but I dought that they are down any more then 10 feet. Also try some night crawlers on them Blue fish.
Also behind the break water on the flat grounds usually good fishing there for blues.
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