Sick, having a backyard park is awesome.
This is mine from last year (its not year round), df, 12 ft box, wallride and a small jump.  
http://media.nscdn.com/uploads/member/pictures/1276477760Backpark.JPG
http://media.nscdn.com/uploads/member/pictures/12764779222222.JPG
However next year we have big plans.  Building huge drop in on top of the hill to get a jump hopefully twice/three times as big as the picture above.  Rails: DFD, 16 ft flatbar, cannon rail to steep landing, and the box will be just extra to attach onto the other rails.