Brian,
Getting into the 40 for S&S is solid. Watch your recovery now.
Great idea for those farmer's walks. When using different weights, just turn around and switch hands to balance things out with each pass.
We do this one long but sufferable session with our classes: 10 x 2-hand swings; 35m walk (2 bells); then either push ups of goblet squats on the other side 20-1, or 1-20. So, 10 swings, walk, 1 push ups, walk, 10 swings, walk, 2 push ups, walk, 10 swings, walk, 3 push ups, walk, and so on up to 20 (or down to 1 if you start at the top).
If you're using the right sized bells, it'll take about an hour ... and put some hair on your chest too. Just don't do this one too often - it's like a grad session for us.
I think loaded carries are like the mortar between the bricks - the bricks are swings, DL, presses, etc ... just do some loaded carries here and there to round out a session.