[sweetgoatmama]

I've actually had horned goats bluff charge a bear when it got too close. A couple different times when bear has come into camp and gotten too close to the goats one goats has explained his place to him. These were black bears, not grizzly. If you are concerned, the best place for your goats to be is highlined right next to your tent or hammock. That way they can't scatter and are going to tell you if something is approaching camp. You also aren't as likely to shoot one when you come out of the tent in the dark as they will be contained in one spot.
Work up to your overnights by staying out late in the evening and spending time with your goats as they settle down at night. You can sleep out in the pasture with them in the spring and get your highline procedures all worked out.