I've been to Yosemite once a couple of years ago in early June. Spent most of my time backpacking in Hetch-Hetchy and dayhiking from the Valley. I had to defer going to Tuolumne because Tioga Road was under late spring snowpack. Well, I'm planning to return next summer because I've won the High Sierra Camp lottery, and managed to reserve a full HSC loop (counterclockwise from Tuolumne to Vogelsang) from July 10-16. I thought I was good to go, but then I learned that the HSC doesn't always open by July due to snowpack. I'm told that it's an El Nino year and snowfall is expected to be heavy. It's not too late for me to get Travel Guard Insurance, according to the reservation office, but now I'm wondering if I'm just plain screwed on timing.
So, my question is: What are my best B-plan options if some or all of HSC is under snow in mid July?