If you're willing to drive a bit, Pinchot state forest has a figure 8 loop with the parking lot in the middle, I think the whole route is like 25 miles which is pretty perfect for a weekend but you can also cut it short. It says primitive camping off the trail but there are a bunch of established campsites all along the way that have been formed with fire pits and stuff (you can have fires here, which is pretty sweet) and there are I think 3 or maybe 4 running water sources along the loop to refill at.