We were really fortunate about the time we arrived at Yosemite. It was the first week in June and we had a rough plan to drive over Tioga Pass and down into death Valley. We hadn't done much research about timings and didn't realise that the pass is often still shut at this time. Fortunately, it opened just 2 days before we drove over the mountain range as the snow had thawed enough to open the roads.
The other reason we were so fortunate is that the melting snow meant that the waterfall's that Yosemite is so famous for were at their fullest and I was able to get some really great shots of this which I will post soon.
Here's a shot of the melting snow at 10'000 feet as we reached the top of the pass.