Hi there
As a vet, I was at a meeting in Aberdeen on Thursday when MSD were launching the vaccine to us.
They advised that with small herds of goats it may well be worth vaccinating, basically it sounds like the side effects are short term temperature and upset tums, so may feel bad for a short while and then pick up. The alternative - potentially dead kids, a very difficult and unpleasant kidding for all concerned - is probably much worse than a short period of being ill. They advised dosing in the same way as sheep, with 2ml single injection, at least 3 weeks before covering with a billy/AI.
In terms of doing breeding males, the vaccine manufacturers have a statement on the label NOT to vaccinate breeding males, as they are not sure what the effects on fertility are. Although the virus is known to be spread by midges, there is still a possibility of spread by other means such as semen, but they don't know yet. As adult animals tend to have mild disease, and the main problems are when pregnant females are infected early in pregnancy, covering any females that are going to become pregnant in my opinion has to be worth it.
Hope that helps
Suzanne