GCC#020 Turtle Puzzle Mystery Cache

Tupper T. Turtle sat on a wall
Tupper T. Turtle had a great fall
To hunt for clues that lead to his den
Put Tupper T. Turtle together again

Additional clues to the final stage are found in caches GC5QJNA, GC5QJNN, GC5QJNW and GC5QJP1, but to understand the clues you must start here. An easy hike along a level stretch of the Homesteader/I.B.&O Trail, 1.6 km from start to final stage.

When you locate the puzzle box, the combination is 30-5-20.
Turn right three full turns then stop at 30. Turn left one full turn then stop at 5. Turn right to 20.
The final stage was relocated October 2021 due to new home construction.