Your state is about as EPA regulation happy as mine - what you are propsing is highly regulated, and I can't do it to raise more crops. You probably have regulations preventing you from doing it too. I have miles of tile in my farm, could use a few miles more, but the govt red tape takes months & months these days, and if it has not previously been tiled you or some out of luck.
You shouldn't need much of a plan - probably not real ethical to waste a profesional's time in that way????
Rent a trencher, dig a trench, and the water will need to drain somewhere - to a creek or out the side of a hill, etc. More drop to the ditch or hill is not a problem, just make it slop that direction. It is really nice to get 2 feet of dirt over the top of the tile, you don't _have_ to be 3 feet deep.
In the wettest spot, might be good to put in some gravel to very near the surface as you fill in the trench, let the water a quicker path down to the tile.
That about covers it, not a big deal other than the legal issues. Well, and don't dig through a power, gas, or telephone line. Duh.
--->Paul