Bassun

So got word from the pros, complete with exact part numbers!  Thanks Russell's!
 
So with the Hook series here is what you would need to run the HDI transducer (giving you 2d and Down Scan).

7-pin-xdcr-adapter-to-hook2 (Part Number 000-14068-001)This is the adapter cable from the Hook to a 7 pin transducer: $29.99

Lowrance-HDI-Skimmer-83-200-455-800-T-M-Transduce-p/000-10976-001-low- 7 pin HDI transducer $119.99

hdi-trolling-motor-adaptor-for-skimmer -Adapter Cup: $19.95

So the old classic is back in action again.  Hair jigs are DEADLY on smallies.  Before I give my opinion which is basically just what works for me, here is a link to a little more talented and well known name:  http://www.bassresource.com/mike-iaconelli-fishing/hair-jigs.html
 
Mike obviously knows what he's talking about...
 
Me personally I have the best luck using a setup with a 7' med-light rod with a fast tip, and a spinning reel.  (Pfleuger Trion now, but used to use an Avocet iirc).  I run 6 or 8lb floro, I think it's Vanish or Transitions by Berkly but I'm not positive I just know its super tough and seems very clear in the water.  I can feel every little bump and touch of the lure with this.  I look at my hair jigs as food.  So a brown, organge or even black and blue, I will consider a crawdad usually.  I will fish those right on the bottome lightly hopping and skipping them around.  Whites, and white with a splash of chartruse (of course with chartruse for smallies ) I look at being minnows and will generally swim them.  I love using those at the tails of riffles and on leading edges of drop offs.  Those are the only colors I fish with any regularity.   I fish them nice and slow and let them do their magic. (oh I have used an orange one with some flash in it and swam it along the bottom once when I saw bass feeding on some small orangish minnows.  It worked great, but only that one time.)
 
This is one of those lures that even cross over into flyfishing for smallies it is so effective.  Especially swimming them.  A clouser minnow is a deer hair version of the same thing (basically), and the same results can be had.  In fact, if you fish ultra light I would even recommend moving to the clouser version for swimming.  It's very light so you can really keep it in the water column while moving it very slowly.  I tie my own flies so I can adjust weight etc, but the standard pattern available at any fly shop is deadly on an ultra light setup.
 
I personally don't have nearly as good of luck with these on largemouth or even spotted bass.  However, smallmouth and red-eyes (rock bass) in my area just devour them.  (SW Virginia).  Here's one more tip which is unasked but helped me learn how to use certain lures in the past.  Next time you go out on what you think will be a good day, ONLY take some hair jigs.  Force yourself to use them for a day.  Watch them, feel them, see how the fish react differently to them on the bottom vs when your swimming them.  I will almost guarentee you that by the end of the day your confidence level will be so much higher with them, you will seldom hesitate to use them.  BUT -- be sure you're not setting yourself up to fail.  If your trying to use these guys on a med-heavy baitcaster with 25 lb mono or braid; your success will be greatly reduced.  Think of them as a finess jig and fish them as softly as you would a 4in black and purple finess worm and you have the right touch. 
 
Good luck, be careful and TIGHT LINES!