I rarely use Traeger pellets in my Traeger Select pro because they cost more. My go-to pellets are Bear Mountain that I get from Cash-n-Carry in Portland, a restaurant supply store. $9 per 20 lb bag. Every flavor. They work great.
I think you will like them. Most of the flavor, with wood cooking, is in the bark and Lumber Jack uses the full bark logs to grind up for their pellets. They may have a little more ash then some others but they give a very good flavor to the meat.
You can order them online from Dick's Sporting Goods and they have free shipping for orders over $49. I get mine from them when the have a sale. I just loaded up on them because they had a 20% off sale.