Craig, you should be able to fit the AMNPS in one of the bottom drawer compartments of your smoker. We don't know because we don't have your smoker. If it don't fit there, you can put it on the bottom rack inside your smoker even. The AMNPS would go inside of your smoker and burn pellets or dust.
As far as your chips, the reason they don't stay lit well for your caseless sticks is because the element isn't firing very much when smoking at such low temps. For smoking pretty anything else requiring 225+ temperature in the smoker, they will do just fine...you'll just be replenishing them as they burn on like normal.