Hunting the field edge depends on the field. Peanuts stay very short, & deer often are reluctant to come out until very close to dark. Typically late evenings are best. Stand locations near the field in staging areas or travel corridors leading to it may be better choices. If scouting proves they are comfortable out in the field earlier, hunt the field.
Biggest issue you'll have is that farmer will dig those peanuts just before gun season, & bowhunting a big field can be an exercise in frustration, wishing you were over there or they were over here. Once the plants are dug (or if they are yellowing already) deer will have much less interest in the field, particularly if acorns are available. After digging, deer will continue to feed on the resprouts from nuts that broke off the peg until frost, but often not till 0-dark-30. After picking the field may be littered with peanuts, but they'll spoil quickly if it is rainy.
Deer have far less interest in the peanuts themselves, much preferring the plant. But if you have hogs, be there the first night they turn them; you can fill the larder & endear yourself to your farmer.
