A few days ago, the rangers told me that the Jakes Creek Trail is not accessible because of road construction. I'm not sure how long this will last.
Right, the upper parking lot is being redone. When I was there again in April, the plan would keep the Elkmont Campground open, however -- adding a mile or so of hiking to the TH, if I understand the project right.
Anyway, if anyone out there in Internet land reads this page, call the park for construction info in summer 2010.