Worms work just fine, but you don't get a reaction strike that a moving bait might generate.  With today's electronics being able to find schooling bass has never been less difficult than it is now.  I'm partial to throwing floating worms carolina-rigged on offshore schools.  It's a change of pace when I'm vertical jigging and they aren't reacting to the spoons.  

 

 

EDIT:  In 5 years later.  Jeesh.  

Are we talking winters up in the northern parts of the country or in Florida? Because they are very different. In warmer climates, I see no reason why soft plastics wouldn't work. In the northern part of the country, we're a little more reliant on a reaction strike. That said my season generally ends when the water ices over, but finesse presentations can still be quite effective when the waters right around 40 degrees, pre-freezing.

In my opinion, a plastic worm is your best bet to catch a bass (artificial lure) 365 days a year.

5 years ago we had pork rind jig trailers

I still have a bunch of pork.  I switched to saltwater fishing for years.  Now I'm craving fooling some bass with all my old tools.

I have a family member that uses a 7 1/2" Culprit worm in Red Shad Green Glitter 99% of the time regardless of the time of year. I've tried my best to get him to use other plastic baits but with no luck. His philosophy is the fish will either hit it or they won't. He seldom gets skunked.