SkipD wrote in post #13273427
Thinking wide-angle for a group portrait in a place like Yosemite is absolutely the wrong way to think in my opinion. You would probably be putting the camera WAY too close to the group and you'd miss all of the stunning background in the shot as a result. The potential for a great perspective would be ruined. ...
I was just about to say the same thing (In fact, it was Skip who helped me become aware of this concept some time back.)
With good lighting, your 18-135mm lens will take great shots and allow you to vary the perspective to your taste.
Perspective, which is mostly controlled by distance from your subject, will make an incredible difference in Yosemite. Think in terms of how large and majestic the moon looks when it's first rising above distant trees, and how small it looks when it's straight overhead. Stand close to your group with a wide angle and El Capitan will appear to be the size of a postage stamp. Stand a good distance away from the subjects, zoom in with a telephoto, and distant El Capitan will tower over the group, the way it's supposed to. (Not to mention that your friends will thank you for not fattening them with the wide angle's distortion!)
That said, there may be some cases where you want to get the whole valley in the photo. With just two shots, you can stitch together a much wider and higher quality panorama than the 10-22mm lens can capture.
Just remember, for the critical shots, to take plenty of "backup" shots at different exposures, different apertures, etc. (Also, it wouldn't hurt to grab an extra shot with your point and shoot, just in case of disaster.)