I'll let those who know answer your question about outdoor shooting areas, but I thought I would take a moment and welcome you to the forum. As you've already noticed, this place does have a lot of good people and good information. I've learned a lot from them myself.
There's a meet for coffee in Federal Way tomorrow morning that you may be interested in. They actually meet on the second saturday of every month. See this thread: 2nd Saturday OC Meet. Straight shot down highway 18 from Covington.