Actually, I've wondered the same myself. I'm in the middle of posting my trip reports and reading others, and I was interested in several posts -- one has a link to photos from a recent trip and another has a link to the whole trip report!!

I'm especially interested in the pictures link because I'm planning on letting others know about my own photos, but I thought I would have to do this in my profile. Which is OK to do? I want to make sure.