Here's a link to a MetaFilter discussion on Deep Springs; there are some interesting viewpoints, including some from people who've had personal experiences with the school.
(If that link doesn't work, it's:
http://www.metafilter.com/mefi/30826 )
From the metafilter thread:
Back when I was in college, my advisor taught there for one of their terms (which, IIRC, was about 6-7 weeks, with 6 terms/year.) Since this was right when I was supposed to be starting a summer's worth of research, he arranged for me to go out there and visit for two weeks.
What I remember most about the place was the scenery some of the most austere, stark, gorgeous terrain I've ever had the pleasure to see. There's at least one mountaintop within day-hike distance of the campus, and a gorgeous National Forest within a couple hours' drive.
The work is hard I helped out with collecting the alfalfa bales from the field, a relatively minor task, and even that taxed my pasty, white, East-Coast-liberal-arts-college-attending muscles. Most of the cattle were up in the high pastures when I visited, IIRC, so I didn't get a chance to see that aspect of it. I do, however, remember the existence of a student job called the "cowboy", which essentially consisted of spending a term in the higher pastures with the cattle instead of taking classes.
And yes, the all-boys atmosphere was certainly palpable (campus-spanning games of Capture the Flag; girlie mags in the dormitory bathrooms), but there were a few women around (a couple of the farmhands and a couple of the professors' wives, when I was there) to keep everyone from strutting around starkers.
If I'd known about it when I'd been in high school, would I have gone there? I think it would have looked incredibly cool to my seventeen-year-old eyes, and I might have applied. If I'd gone, though, I'm not sure it would have been to my benefit in the long run; given how socially awkward & sheltered I was when I graduated from high school, I'm not sure that two years of talking to the same thirty or so people would have helped.
Oh, and I'll be surprised if we get any replies from current students (as interesting as that would be): the Internet connection available there consists of a 2400-baud modem daisy-chained via microwave towers over the mountains to Bishop, CA. The connection goes bad if it gets too windy, and every now and then a transmitter breaks down and the connection goes out for several days.