Alabama Joe posted:Any tricks to make the Smoking Caboose really puff out some smoke?
Above photo from this earlier OGR thread on smoking caboose. Taking your question at face-value, and as suggested by GRJ, I'd say a fan-driven unit is the answer. There have been several earlier OGR threads on this. If you are mucking around with electronics anyway, consider a timer module (~$3 on eBay, free shipping from Asia) to cycle the smoke unit on and off - say 1 minute on, 5 minutes off, or whatever. This would reduce heat build-up and make it more interesting.
Scented smoke fluid - e.g., Bacon & Eggs, Hot Chocolate, Coffee - can give the illusion that there's a conductor alive and well back there!