HANDWRITTEN TITLINGS
At some point Barks had Xerox copies made of all the pastels, and he furnished them with the titles at the bottom of the individual pages as can be seen below.

ADDITIONAL IDEAS
Barks did indeed have more ideas for pastels, but they never went past the initial idea stage. Here are some of his rough scribblings:

Bin:
Scrooge skiing down money slope.
Scrooge uses snowmobile.
Scrooge uses snowplow.
Scrooge uses rototiller.

Golf:
Don ready to drive. Gopher cops his ball.
Don ready to drive. Crow bites on his club.
Don drives ball. Top half of ball sails away. Bottom half stays on tee.
Don's drive hits ball which doesn't move. He is jarred jagged. Kids behind bush with hammer. They have nailed ball to ground.

PASTEL DISPLAYS
Barks kept several of the pastels in special showcases in his home. The two photo examples below were taken by Barks himself.