Your brother's terms are the highest I've heard of in that area. Since it is not a Bakken play, the Golden Valley lease offers are nowhere near the same as those over in Mountrail or Dunn Counties. Securing $1000 or 20% seems unrealistic based upon what has been paid, but the clauses should not be an issue. Yet you are right to think big and then negotiate from there.
As to if Whiting did re-enter the "Maus" well to go horizontal, it is likely they would go north from Sec. 22 into Sec. 15. That is the pattern which fits the other spacing Whiting already has in that township. If they pool more 1,280 acre units then you may expect Sections 27 & 34 to be combined, and Sections 26 & 35 combined in another. However, "Maus" was a vertical well. So if Whiting drills more vertical wells there they won't need to create any new 1,280 acre pools.
Fracking during the winter is more difficult and costly but it is done all the time. Yet it looks unlikely Whiting will drill any more wells there this year. Their Sept 2011 corporate presentation suggested the "Nistler" well will be their final one drilled during 2011. There was no mention of their plans for 2012.