 Visit OregonDefensibleSpace.org. OregonDefensibleSpace.org. That's OregonDefensibleSpace.org for more information and to schedule your free assessment today. Don't wait. Let's make Oregon safer together. Don Johnson Sales in Walla Walla is where you'll find your new or used horse, stock, or utility trailer. The trailer place also handles all kinds of service or repair for your trailer or RV. Looking for a new ATV or UTV? They're the Valley's only Polaris dealer.