As seen in the above post -- there are dozens, perhaps hundreds of dude ranches and semi-private inns that are located on ranching properties. I drove past several of such establishments this month. A more likely search terms would be ranching holidays -- a quick search on Google pulled up dozens of such places in 8-9 western states -- this site is the type of result you can find.

In addition, I am from a ranching family with dozens of ranches in Montana and Wyoming. And I might be able to make some inquires for you.

Mark