Assuming you're talking the Merrimack, I dunno. The jetties on both sides are a biatch to get out to the end on and can certainly be tough to fish on, even with Korkers (steel studded soles for your boots).
If it's another spot that's a little easier to fish, I would only be there with plugs/plastic/or eels. The jigs, worms, and bait certainly do well but I just don't fish with the dead bait at all anymore and rarely Jig once bigger fish come in (although that is an excellent method for big & small - just not enough time to do everything)
Fishing primarily with live eels, if I'm not getting anything but fish are there, I'll switch to wood plugs & teasers or move to another nearby spot.
A half hour fishing one spot when conditions are decent does not determine a nights fishing, at worst it tells you to hit another spot. Also depends on what kind of mobility you have. If you're a long walk from you truck or car, you may want to experiment with different plugs or lures and/or move to another close by spot.
Just so you know, I'm not an expert at coaxing the fish to my line under a variety of conditions. Not enough time & experience under my belt to proclaim myself as one. I consider myself average to competent in my abilities but that's as far as I'll go
