Basic River Fishing questions

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Ok,

I have done a few searches with no success.

Basically I am new to the "plasitcs" fishing. I have always relied on live bait, spinners, crankbaits, topwater etc.

After getting the methods down I am very interested in fishing a local smaller river. Its got a combination of debris, damn, reeds, fallen logs etc.

What are some tips or techniques for fishing plastics on or in a river.

I understand that the bass wait in the lull areas next to a current for many reasons two being its easy and they use less energy.

Should I change my presentation from the T-rig and C-rig lake style? Meaning can i approach a river with those same setups and basic techniques?

If not what rig style would some of you recomend?

Also given the current it would seem the worm would do most the twitching work itself.

Any length of worm preferred over another for a river?

Its as narrow as 15 feet and as wide in areas as 50+. Its depth is normally between 2-6 feet. Although it has some deeper areas.