what he said! can't believe I forgot to mention crawdads...
In terms of streamers vs. small flies, I personally think you'll have a better chance of landing a big fish on heavy tippet and a big xstrong #2 hook, than with 5x and a #18 fly (although my best brown was taken on exactly that)
For slower presentations on sinking line, you can trail a small chironomid, callibaetis, or other nymph behind a streamer or crayfish. Fun way to fish, because you'll get hits on both.
Look up Brain Chan, he is the man at stillwater tactics.
A photo to get you psyched for pig hunting.