Just today did the Poker Flat Trail in my stock 05 TJ Rubi with my wife.
The area is in the heart of the 1849 gold Rush country. Mostly easy dirt roads that are carved out of the steep mountain sides except the drop into the canyon where it is definitely 4 wheeling.
Where: North of Lake Tahoe...Take Hwy 89 from Truckee to Hwy 49 and over to Downiville to the start. Then about a 5 hour ride on dirt roads and canyon 4 wheeling over to La Porte.
Might be a lot of driving though. The only tough section is down a gnarly very steep old road into the canyon to Poker Flat and back up the other side. The Stock Rubi had no trouble.
Time: Total time was 12 hours from the time leaving home in Reno and returning. We did stop for brunch in Downiville and also stop for photo oportunities. Also paved road from La Porte to Hyw 70 and back to 89.
Link:
http://4x4trailmaps.com/4x4Trails.php?Trail_ID=46
BTW the Rubicon trail is extreme. I wouldn't want to beat up my stock Jeep trying it. Motorcycling it was enough.