Good morning! I worked on something last night.
First of all, here is a good article explaining cell tower triangulation.
Cell Tower Triangulation – How it Wor
I also found a map of cell tower locations (red balloons), and added possible cell ranges for some of the towers that could have been pinged along the straightest route from 385 and 200 south to 460 and east to the cornfield.
*I'm estimating the range sizes based on general information because I don't have specifics.
Map Key:
*Blue Line - CR's possible driving route
*Orange circles - small circles are the tower I'm referencing, large circles are the possible ranges, and these are the towers CR would have driven through first heading south on 200.
*Yellow circles - small are the towers being refereneced, large are the ranges, and these are the towers CR would have driven through going east on 460.
*Red squares are the 430 point of interest from LE map, and the pig farm.
Bear in mind, I'm considering two towers being pinged at once since the route seems mostly to be even between towers. This may not have been the actual case. Also, in reality each range is divided into sectors, which would have narrowed the overlapping area even more, but I don't have that information, either.
IMO, if CR was driving east on 460, almost to hwy 21, just north of the pig farm, the farm very well could have been within the triangulated range. Most of the areas searched near Guernsey are probably in range. JMO