I'll bet there is alot of browse and shoots that deer can eat in the CRP fields, but even a havested bean field out ranks the CRP for a food source at this time of year. The deer will feed in the beans until the weather freezes the field, or heavy snow is covering the field. I'd hunt closer to the bedding (crp field) , try to cut off the travel routes, without walking the bean fields in the mornings. In the evening the deer should be moving into the fresh cut beans, so you could get away with moving across the fields earlier in the afternoon. You may want to set up a ground blind, even out in the open, if deer are not being hunted from blinds in the area, you might just suprise a few deer. Good luck!
"Let a young buck go, so he can grow."