Is it worthless to hunt small fields in public land?
No place is worthless. Is there a food plot on the small field? Are there travel paths heading through the field, etc. What is more important than the field itself, is what is around the field. Scout it out. No place is worthless.
ALSO: During the rut, and gun season, a lot goes out the windows. The deer might travel a certain path everyday until one day they wake up and there are guns going off everywhere. There are tons of hunters in the woods pushing them every single direction, etc. At that point they might run right through that field u speak of. Hope this was helpful.