Best advice I would give you is talk with the gals in the WG&F office often and give them your phone number. We had regular contact with the GW over there too as he keeps tabs on the bison herds.
Bulls will move over sooner than cows, be ready to go on a days or half days notice.
We went for our cows when bison were close but not yet on the NER and had to wait a day or so but they moved on.
I also looked at the Kelly, Wy webcam and watched for groups to get near the road and river where they cross near Kelly. https://www.alltripcams.com/jackson_hole_wyoming/grand_tetons_kelly_wyoming
Horses are an advantage but not necessary, we did our hunts on foot, take snowshoes. Do use Tag N Drag for retrieval and gutting unless you have horses.
Bulls will move over sooner than cows, be ready to go on a days or half days notice.
We went for our cows when bison were close but not yet on the NER and had to wait a day or so but they moved on.
I also looked at the Kelly, Wy webcam and watched for groups to get near the road and river where they cross near Kelly. https://www.alltripcams.com/jackson_hole_wyoming/grand_tetons_kelly_wyoming
Horses are an advantage but not necessary, we did our hunts on foot, take snowshoes. Do use Tag N Drag for retrieval and gutting unless you have horses.