Hello Linsey. Looks like your first post here, so first off...welcome! Sorry someone hasn't answered your question sooner...hope this isn't too late to be of any use.
Your Traeger will put out pretty good smoke on the 225 setting...but probably not as much as on the Smoke setting. However, if you try to run an entire cook in Smoke mode, you may never get the meat done. You could try it a couple different ways:
1. If you like lots of smoke flavor, run your cooker in Smoke mode for an hour or 2 to get plenty of smoke on the meat, then bump up to 225, or even 250, to finish the cook. Also, if you have a dependable BBQ thermometer, you might want to use it to double check your Traeger's controller. Don't assume that you're actually cooking at 225 just because that's what you have the controller set at. Those analog controllers are sometimes not as accurate as you'd think.
2. Run your cooker at 225 for the whole cook. Like I said above, your Traeger will make nice smoke at 225...just not as much as in Smoke mode. A good rule of thumb with pellet smokers...the higher your cooking temps, the less smoke it will produce. Again, verify your cooking temps with an external therm that you know is accurate.
You'll get a better handle on how satisfy your own tastes as you experiment with it a little. One thing I do when smoking at higher temps in my pellet cooker, is use an added smoke generating device for more smoke. There are several options out there...just Google BBQ smoke generators, and you'll get plenty to look at. One generator that is very popular on these forums for pellet cookers is the Smoke Tube from A-Maze-N Products.
Hope that helps...good luck! Be sure to let us know how it turns out...