At this stage, there is no need for PRB to JV with anyone on the MW property. PRB has more than enough funds to drop holes at MW
As to all of you who expect large cash flow from the Goldex NSR - you're either dreaming , overreading press releases or sorely misinformed (no disrespect intended). The NSR may pay for alittle bit of drilling in the future, but likely is not a huge source of revenue.