UPDATE:
I made a small trench with my middle buster (~4-6" deep x 12" wide) in a little different layout than my original plan. I was afraid to go too deep on the first pass because of how wet it was (didn't want to get the 'bota stuck). If you look at the attached drawing, I stayed high on the property and tried to catch all the water before it makes it's way into the field. Well, water started flowing almost immediately after I made the shallow trench. I pretty much had created a small stream from the high end of my property then directed it to the low end. I thought that my troubles might be over when I saw all the water flowing, but soon realized that there is water coming up in other areas of my property that are lower in elevation than the trench. Ground water must be flowing under the trench, and up through the ground in the middle of the field. My thought is that I need to go deeper. Does this make sense? My next move is to make another pass with the middle buster and see if I can get down another 6-8". If that doesn't do it, I have access to an excavator but would want to be sure that I was on the right track before I begin a project like that.