Washington State parks don't allow pack goats?

[Perry]

My general experience is that the National Forest allows goats in stock campgrounds; usually, not in regular campgrounds.  However, sometimes I’ve asked a campground host if it’s OK to camp, and they’ve said yes.

My experience with Washington state parks, is that it depends on the park…ask the park ranger.  Usually where they allow horses, they’re fine with goats.

I think the regulations you reference are a ‘general’ rule, then the individual parks have excepts, perhaps on a trail by trail basis.  They tend to do that with all kinds of uses.