My question for other PNWers is, what sort of substrate do you use in your pens? I have seen sand, dirt and bark mulch in your pictures. My pen will be in the lee of our house and the soil drains pretty well, but it rarely dries out for 9 months out of the year. We live in that wonderful "Convergence Zone" the weather guys talk about. I don't want my pen floor to become chicken poop soup.
First off Jennifer, welcome!

I only have 3 birds, and it sounds like you will have just a few, too. I'm in Auburn. It looks like you are near Seattle, so we have similar weather patterns. Good news... a few birds is very easy to care for. You probably will not get over-run with poop, unless you let it go for days and days without scooping. I have not gone through a very rainy season yet, so I know I will have to figure out if what I am doing continues to work for me through the fall/winter.
My birds live on bare earth. I sprinkle oyster shell and grit on the floor, plus I provide grit in a separate bowl. I scoop poop in the run every single day and throw it in my compost bin to keep the fly problem down. Since my birds are on bare earth, it is easy to scoop up the poop with a cat litter scoop. Those with large/numerous coop(s) and birds can't really do that unless they want to spend their day being a super pooper scooper. With only 3, it is very easy to do so. It takes me about 5 minutes, and I do it while I'm checking on food/water and visiting with the girls. Before fall, we will install a translucent plastic roof over the run to help keep the run dry for the birds (since chickens don't like to get wet).
Here's my coop (without roofing over the run). Right now, if it rains, the ground gets wet and the chickens just sit around beneath the coop.