I just ordered my 2016 Trailhawk, so it will likely be a couple months before I get to join you all but I live on Sultan Basin so I love to hear about you coming out this way.
If you're near I-90, head over to Cle-Elum, follow it back to Salmon La Sac Campground, at the bridge, head up the hill to the right rather than crossing the bridge to the campground. Some great trails up in there. If you have some friends (with their own Jeep), try and find your way up to Lake Ann, just below Mount Stuart. Beautiful area with a few moderately difficult areas to get past. I did this with my Wrangler, but I suspect the Renny will make it as well if you have off-road experience, and a spotter, and possibly a portable come-along/winch.
For those of you (us) on Hwy 2, Has anyone been to Reiter since they .. re-vamped. Website says its limited to 1/2 mile of 4x4 now. Suck.
Note: If you go to Lake Ann, have a 2nd Jeep with you, do not try that trail solo. It's also REALLY helpful if you go with someone who knows the way, the last trail (the only hard one) where you leave the graveled logging roads to an actual trail, is hard to spot depending on time of year and how many others have cleared the way before you got there.
Also note: your in elevation, once you see snow. Stop, take pictures, turn around. I find too many stuck 4x4s in the snow. Ride down on back of my snowmobile is free, getting your Jeep back is not. Stick to the mud
-Dailach 10/21/15