Whether it is the Red River or Duperow, these are there but tend to be rather small and difficult to find.
But if you could find another Lodgepole mound, there is plenty of money to be made.........
Considering there was only one Lodgepole Mound, I'd put more stock in the Duperow or Red River, just on distribution. Production from both is down the Nesson Anticline to the Antelope field, and there are field designations in the Beaver Lodge of BLMU, BLDU, BLSU, BLOU (Beaver Lodge Madison/Devonian/Silurian/Ordovician Unit) that persist.
A fortune was made in the Red River B (around Bowman, especially) through horizontal wells. It was the big boom before the Bakken, and proved the concept of draining a larger area through one wellbore, as a strategy. The Nisku/Birdbear A was getting similar attention, especially in the Western part of the Basin, until the Bakken play got rolling.
The Red River C zone is a tougher proposition, does better slightly off structure (no anhydrite plugging, better porosity), and the reservoir geometry is complicated.
For example, we drilled a twin to a well that had had mechanical problems in the Red River, almost close enough to hit the walking beam on the pump jack with a rock from the shale shaker (It was producing from another, shallower formation). Our porosity was right under the C Anhydrite, and the zone tested sweet crude. The original well had porosity 20 ft. below the C Anhydrite and it was sour. I just said "When this one is depleted, run a whipstock and go over there and get that one, too."
The Duperow can be hit and miss, the Nisku/Birdbear tends to be structurally controlled, and the Interlake (if not salt plugged) should be tested on any structural closure that gives off any gas, even a few units. It tends to be vertically fractured, should be choked back and produced from the top so you don't cone it in. The last 'find' in that came in like water in the DST and looked like lighter fluid (70 gravity), but I heard the operator perfed an extensive interval and got water in production testing--likely far too much.
We've left out the Winnepegosis patch reefs, the Dawson Bay, the Stonewall and Gunton, and haven't mentioned the Winnepeg or Deadwood sands for tight gas. I don't know if there is any helium down there worth messing with, either (we ran standard C1-NC4 chromatographs, filament or FID, but not mass spec in those days), but the proximity to the Granite Wash might mean there is enough of that to be a worthwhile byproduct. That may yet yield another boom in the southern basin margins or even the deep basin, something to consider, anyway.
There is a lot of oil and gas left down there, even when the Bakken/Three Forks play is developed.