I use the
A-MAZE-N AMNTS 12" smoke tubes. The ratio is probably 95% wood chips and 5% pellets. I just use the pellets to fill in gaps between wood chips. You really need to pack them in the tube with a rod or some hard packing tool. If they are packed down good, you'll get 3 to 4 hours of blue smoke that is not harsh at all.
After you load the tube, stand it upright (I put mine in a can so it won't fall over) and light it with a torch. Let it burn for 5 minutes or so to make sure the wood is burning well. Then blow out the flame, put it in the smoker and let it smolder for hours under the meat you're smoking. If you don't have an upper rack, it will still work by letting the smoke roll over the meat on the same level. Upper rack is better, as it will create the BBQ bark that is so nice.
These are some ribs I made on the Traeger using this process. I'm selling my Weber smoker because these actually taste better.
I've read that meat will only take smoke for about 3.5 hours. So this is plenty of time to smoke the meat.
Good luck with your smokin'. : )