I recommend it! It is not the easiest double, but it isn't the hardest either. The route is about perfect. You can self support for the first 100 miles, as there are plenty of restaurants and stores along the way. After lunch, the section along Highway 120 up Sagehen and through Adobe Meadows has nothing whatsoever (no water, no food, and no people). That is one of the most uninhabited parts of California (probably why you'll often see wild horses and burros there). Pretty much zero traffic too. There is traffic along US395, but the shoulder is wide. And you really don't spend hardly any time on it ... most of the route is on secondary roads.

The weather this time of year is also typically ideal. It is hot at the start and end in Bishop, but since you leave at 5AM, it is actually cool, and it is reasonably comfortable on the trip back at about 7-8 PM. By the time it heats up in the valley, you're at 7000-8000 feet, where it is much cooler.

The roads are in good shape and the scenery is truly awesome. IMHO, it is the most beautiful route of any double century ... certainly any I have done.

I say go for it next year!