Hit and miss along that road. The first pit, right as you cross the bridge is technically Plum Creek, and therefore no shooting. Go up the road a ways, but before the surprise lake trail, and it turns into NFS land, but then kicks back to PC again almost all the way to Coplay lake. Get to coplay, and your back on NFS land again, and on up to the summit lake trailhead.
That said, everybody and their brother shoots at that first pit. Ive never heard of anyone getting busted. Cant say the same for the road out of Wilkeson. The first 6 miles is plum creek and Hancock, and I HAVE seen guys get busted on that road, even tho again, everyone shoots there too.
Evans Creek ORV is within the USFS boundaries, and the USFS allows target shooting unless an area has been specifically closed. Im not aware of an evans creek closure. I do know they've shut down everything along the I-90 corridor.
You can look up land ownership in pierce county here:
http://matterhorn3.co.pierce.wa.us/publicgis/
click IDENTIFY, and where ever you click will pop up a box. Click on assessor/treasurer EPIP, and it will give you the tax record of who owns that lot. You can also do "no shooting" overlays to see what parts of the county are banned for shooting. (public safety/sheriff restrictions overlay).