NavyMike
Regular Member
I suspect that they are trying to use the broad definition of building found in RCW 9a.04.110 (5)
(5) "Building," in addition to its ordinary meaning, includes any dwelling, fenced area, vehicle, railway car, cargo container, or any other structure used for lodging of persons or for carrying on business therein, or for the use, sale, or deposit of goods; each unit of a building consisting of two or more units separately secured or occupied is a separate building;
Also, see here for how case law and legislation evolved to include fenced areas as buildings for the crime of burglary. My guess is that they will try to extrapolate it to your circumstances.
http://courts.mrsc.org/mc/courts/zsupreme/149wn2d/149wn2d0342.htm