I am planning on camping in the area on Saturday 6/13 before we attempt our climb on Sunday. I was planning on reserving a site at the portal campground, but didn't reserve one in time. What are the chances a spot will be available at the walk-in campground? I was thinking Horseshoe Meadows, but would like to stay closer to the portal and spend some time Saturday taking photos in the Alabama Hills. I don't think acclimatization will be too much of an issue, because we plan on taking two nights on the way up. Any other suggestions on a good spot to camp?