Artie,
Looking once more at what you wrote about sun angles, I recall that there was some corn planted “inside” the north loop, but not so much. If what you were referring to was this area, then you would be shooting into the sun in the PM: not good. My reference to “inside the loop” would be on the left side as you drove around (it is one-way on that part of the road), and it would be north of the pond area with the big walkway out over the water / pond (the road is two-way from there to the gate).
If there was corn planted on the inside when I was there I may not have even noticed it because it was so bad (shooting into the light) that I would not have spent any time looking at it, though I do recall shooting a few shots there once, with predictable results.
Sorry the place is not what it once was. I visited several times before 2009, and then each year from ’09-’12, and that is what my experience was / when. I always had a good time there, even if I was late in the season (the birds can sometimes be gone by late Feb). It was about a 2 hour drive from where I was living then. It can be a great place, let’s hope it is again.

During the times I visited the Bosque the corn was always planted at the upper end of the North Loop. From the road I’d say it was generally looking North into the corn. Since the birds are there in the winter the setting sun was generally behind most of the photographers and coming over their left shoulders (from the SW).
One of the practices with the corn that I did not mention was that they (I think this was the farmers) would selectively cut swaths of corn for the cranes and geese to feed on. Some weeks later they would cut another swath, and so on through the season. The birds, given the choice of in or out of the standing corn, would generally feed on the cut areas; few would go into the standing corn. Also, the standing corn is where the coyotes would come from. At the end of the season (maybe March or so, I am not sure) the remainder of the standing corn would be burned to incentivize the birds to go back north.
What was in the “deal” for the farmers was that by providing feed (the corn) at the bosque, there would be less loss to the farmers from the birds eating their (farmers’) crops. More or less quoting the farmers at the meeting, they stated that they accept a certain amount of loss from birds, but that they felt it was worth their (farmers’) investment in time, etc. in planting at the refuge. They expressed the opinion that it would not be worth their while if they had to absorb the costs of the corn seed or the fertilizer.
That’s how I recall it.
All the best. Enjoy NY, and have a great Thanksgiving.