I save weight by not carrying a camera. I haven't given up on photographs, however. Here's how:
(1) If I want to show people where I went I send them photos off the internet. I'm honest about it. I simply send them an e-mail saying some thing like "here are some photos I found on the internet of the area I just backpacked in".
(2) I ask others if they would mind e-mailing me a photo. A stranger was happy to photograph me and my camp with Glacier Peak in the background, for example, and e-mail it to me. .