Are the non-reservable campground spots usually full in August?
People don't report that info here, but I think if you aren't particular, campsites are available if you arrive early in the day, especially days besides Friday or Saturday.
I was there twice last August. I found the walk-in campsites convenient. I was there early week both times and only a few of the dozen or so sites were in use.The Ravine area also had many vacant sites and was further from the the trail head. My tent was within 30 yards of my vehicle, bear-proof storage vaults, and garbage containers. And it was a short walk to the Portal Store (and the toilets).
