Here is a photo of the wash rack. Notice the small bars at the back and front for placing pipe or a wood beam behind the butt. We haven't had to secure anyone that much yet but I'm glad we added it. There is a Blocker tie at the front for securing the kids. A frost free water hydrant is about 8 feet away.
I'll also add a photo of our hitching rails. You might consider them instead of cross ties. We put those in this spring, just wood line posts buried in the ground and another post lag screwed onto the top. We spend lots of time out there with the horses. Our house is back aways so we end up keeping lots of crap out there