We don't have a Rural King anywhere close by. The nearest one is over two hours away. For Lumber Jack, I usually go in on a "Group Buy" from BBQ Pellets Online, a one ton order split four ways, so 1/4 ton each, any combination of wood, 20 or 40 lb bags, but has to be picked up at a freight terminal. The nearest terminal in the KC area is less than a half hour away. My latest order this Spring came out to average $0.35/lb including shipping charges, or $7 for a 20 lb bag, $14 for a 40 lb bag.
For a Smoke Generator, I use a Smokai, similar to a Smoke Daddy, available in 1/2, 1, 3 or 4 liter sizes, mine being a 1 liter on a RT-700. Instead of attaching it permanently, I used 3/4 inch copper pipe. I run the fan in test mode on the Bull for cold smoke or run in conjunction with the Bull for added smoke. It uses pellets, chips or small chunks.