The camera is one of the ones we borrowed
When you are finished with your walk, they keep track of which camera you used and therefore which chip your pictures are on, and then they send you an email later so that you can retrieve all of your images.
Tom and I have been thinking about new and improved lenses practically since we bought our new Canon XSi, and this is a great try before you buy option. The first time I visited their site, I saw the Photography Contest header and didn’t wait until the Flash loaded (on my medium speed connection, it takes a while), but their Yosemite schedule is posted there, as well as other parks that they will be visiting over the rest of the summer.