Matt: believe me, there are plenty of rocks everywhere in the Sierra to anchor your stakes, when it comes to that. I mean, within fifteen feet of your intended campsite--at altitude, where this whole scenario comes into play. It's just not a problem. A small mound of three or four stones will hold your stakes as well as plunging them into soft earth. At least, that's my experience. But yes, it might add ten minutes to your pitching time.
I use a Big Agnes tent that requires 10(!) stakes--two versions over 7 years. I've never had a problem staking these tents out in the Sierra.