"And when the starving, screaming goblins come out of Denver (maybe even Cheyenne), looking for rape and pillage, it will be nice to be so far away..."
Being far away and isolated can also work to the advantage of the "goblins" in that they can, potentially, take their time to observe you, and invade when you are least expecting it and in creative, time-consuming ways. Will there be somebody at the house to keep watch 24-7? They will figure, rightly, that folks like us have fat larders that we can live alone far away and we will thus be tempting targets. If and when they can get through your security, you have no recourse and they can set up shop. This is what happened in Argentina, according to Ferfal, in the most brutal ways.
Also, are folks in Newcastle (& Hot Springs, and Rapid City) 100% prepared for hyperinflation? There may be plenty of desperate people even there, maybe more percentage-wise, depending on how the economy there is impacted. In Argentina, the collapse saw mass exodus from rural areas into cities. This is the case throughout the third world too, where people leave their fields and plots for urban shanty towns, seeking better economic opportunity.
So, you can't take for granted, that isolation will work to your advantage, it could be the reverse. So I am suggesting that FSW folks plan living arrangements accordingly. If you already have property that you are committed to, maybe you can add rooms or buildings, to accommodate other FSW members, such that you create a defensible micro community. In any event, a collapse will probably make things much more difficult in rural areas too.