GZ,
I don't have a Traeger, but after seeing the design, I created "Walle", which is a converted Stokematic Coal Stoker which uses the same bin/auger process.
I did a double take on the COST of BBQ pellets, so here's what I did... My neighbor has a rack of dried oak 2x4's that he had grand hopes of selling. I went down to the local equipment rental and rented a wood chipper. I was amazed at how fine it chopped the 2x4's. My rental shop even let me run a board through to test to see if it was fine enough to be taken in by the auger.
Here (Western Slope Colorado), I have to pay about a $1/# for pellets. I figured I chipped enough oak with the two hour rental (5, 32 gal trash cans and every empty bucket in my shed) to come out way ahead.
Anyway, something to try because using the oak as my base fuel to cook and then adding in my flavor about every hour with larger chunks right into the fire produces a very good flavor.
Might try that
Below is "walle"