I tried putting a couple of shots from my most recent trip on:
Favorite Backcountry Photos & Albums
but couldn't quite work out how to do that.

> click "new image"
The two options seem to be
1 - link to a webpage (which I could do)
2 - enter a media tag

Other posts just require a URL.
On other posts I see inputs for thumb, medium, full-size.
What am I missing here?