I think your best hope to be successful around (North and NE of) DuBois where I hunted several years with the fellow who introduced me to Elk hunting did, is to call out and talk with the local Conservation Officier and go only when you know they've had sufficient snow in the higher elevations. (PM me and I think I can find his name.)

Much of the areas where Elk are early are in those designated Wilderness. As a non-resident you can only go into Wilderness with a licensed guide. If you're planning to do that, fine. Otherwise, you likely need at least a foot or more of snow higher up for the Elk herds to move into the intermediate elevations there and to see fresh tracks and move to get around in front of.
You need to get back away from the roads, ATVs and people and expect to hike, listen, smell, glass, spot and stalk for many miles each day, in hopes to get onto Elk.
If you want to PM me, I may be able also to tell you some places we have seen and harvested Elk a few years back in that area. Of course, with the big predators in abundance, they've taken their toll on calves and the numbers have been down in some areas there in the past 3-4 years.
Still, it can be done.