Question 908904
Assuming the poles fit into each other, neither is really a good choice.
However, the 6' pole on the bottom with two 3' poles for the sides means that it lays flat on the ground (3'+3'=6').  The 5' pole will give him a slight elevation.<br>
Personally, I think he's better off driving the poles directly into the ground at a steeper angle and using the 6' pole as a lodge pole (top beam).