For what its worth I was up there over Labor Day weekend and I saw a Honda Accord at the trail head.
And Crown Victoria can drive Hells Revenge. http://www.youtube.com/watch?v=KFwPXEeJ3aI&feature=related
But I wouldn't recommend that either. If you get stuck in the backcountry, you’re obligated to pay the towing bill. Backcountry towing bills can be $1,000 or more. Not to mention your fluids running all over the trails and in the creeks. I'm just saying I wouldn't take it up there, but I'm more cautious than some.