I went up Whitney Memorial Day 2013 with a shaped tarp (Golite Shangri-La) that can be set with trekking poles. Worked fine for me, was too early for mosquitoes. It all depends on how taut a pitch you can get with your gear since the winds can be high (and assume no trees for pitching). I was pre-mosquito season...you may not be. The last two years, toward the end of July, I encountered very few mosquitoes at altitude, but they tend to ignore me anyway.
