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Snowmobiles push the fish right down. Quads to a lesser extent. When the laker fishing gets slow, we do big wide circles on the quad around our jigging area and it always gets the fish going again.
If you don't like power augers, don't fish around me! I am a mobile angler, and I drill alot of friggin holes. Check out the december issue of infisherman, the article on "trolling for walleye" under the ice. They do for walleye exactly what I do for panfish and lake trout. Punch a bunch of holes covering every inch of the structure they are working, and then quickly cover the piece and find any active fish. No active fish? Move on!