The Poker Tournament Formula by Arnold Snyder...

[BigBuffet]

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...many more players willing to call with anything early in the tournament. This makes bluff moves difficult to execute, which is why I recommend sticking with better hands early on and opening up your game later. I think there is a lot of frustration with not being able to use your skill to get ahead of some of the "luckier" players in the early rounds. This makes it seem like a more LAG strategy would work better early, but Harrington clearly tells you this is incorrect in HOH I.

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Opening up early based on chip or position or card moves gives you the benefit of being one of the players at your table to be feared or at least not taken for granted. If you just play tight, you will tend to drive out worse hands or get called by better hands.

And yes, many fishy players call with anything. And that may be a function (bell curve I suppose) of tournament level and structure. By that I mean that at the left side of the bell curve there would be the lower level fast tournies. In the middle of the curve would be the optimim levels. At the right side of the curve there would be tournies that are higher level fast tournies but for which satellites would allow more fishy players to enter. Same for slow tournies.

So I am saying there is a sweet spot in terms of tourny levels where the number of fish is minimized and for which getting incorrectly called when making a move and therefore sucked out on is minimized.

But even so, if you establish yourself as a presence at the table using Snyder's book, you will minimize the negative effect of others' fishy play at most levels (probably higher than Snyder level 3 or 4).