I'm also in WA, have been regularly hiking urban equestrian trails in a WA state park this winter with my goats. The only "organized" state park campgrounds I've stayed at with goats was actually down in OR last March, I emailed in advance for both OR state parks and got the OK as long as I kept them leashed when walking. I also informed them the goats were sleeping in the horse trailer - don't think that was a requirement tho.
It is a bit of a problem to find camping (particularly in the winter), the capitolriders.org web site with horse campground map is a help. Last summer we stuck to USFS dispersed camping if we needed to camp at a trailhead before a trip due to a long drive.
I'm also a bit frustrated by the ban on pack goats in all of North Cascades National Park, would like to backpack the Ross Lake trails with them - I'm unclear why they should be banned there.
Keep us posted on what you hear back from your inquiry. I think I'll email the same folks you did to add my voice
It is a bit of a problem to find camping (particularly in the winter), the capitolriders.org web site with horse campground map is a help. Last summer we stuck to USFS dispersed camping if we needed to camp at a trailhead before a trip due to a long drive.
I'm also a bit frustrated by the ban on pack goats in all of North Cascades National Park, would like to backpack the Ross Lake trails with them - I'm unclear why they should be banned there.
Keep us posted on what you hear back from your inquiry. I think I'll email the same folks you did to add my voice