Clkoberg,
I was not trying to equate one ski pole with two trekking poles. I was only noting that as one alternative (for other people who read the board and do not already have ski poles). If you already have two ski poles then it makes sense to use both of them if you feel comfortable with both of them.
The winter before my first trip up, an out of control skier broke my planted uphill pole, and I bought a used pole at the ski rental shop. That pole is what I used on my first trip up. I have since bought some inexpensive trekking poles and now use them instead.
Fred