Hello Hollowdweller,
Some good points you mentioned!
Yes, my area is stock full of goat and sheep farms.
I most recently worked out in Bodega, for an Artisan Goat Cheese Ranch, had 70+ goats.
As well as helping out and purchasing goats from the large Redwood Hills Goat Cheese Ranch.
There was an outbreak in the area of Q Fever the winter before this. This affects the mother's in birthing. Limits the production of fluids necessary to dilate during labor. Going through the birthing season was rough. Had to keep an eye and ear alert at all hours of the night.
Too many mothers with babies half-sticking out in pain. Many deaths and aborted babies!
A goat will have 2-3 babies, and the young, infected goats were having as many as the old mother's. Those lucky enough with 3 babies were more than happy to offer one up to a mother with an extra udder.
So, to add, a healthy closed herd is a very good thing! Limits and helps to control what maladies or defects that can occur. And they can be numerous.
Another thing worth mentioning is poison oak. They do eat it, stick and all, which is good! But they also like rubbing up against it. If you take them out, beware of getting it on you, or your belongings!
As for taking them to a place like Yosemite, again, I personally would worry about enticing predators. Especially if without horns. Yosemite is a nice condensed area of wildlife. Mountain Lion country. Closest thing to my birthplace of Alaska that I've seen here in California in terms of wildlife diversity. Minus the moose and grizz of course....
I'm moving up that way in the Sierra's for the year to manage a farm/ranch. Should be good in high country. Good air, good fishing and hunting too. The Yuba River is a plus!
Getting soft here by the coast!