If your riding amtrak it is possible to smoke on the train. I used to ride amtrak back and fourth between sacramento and portland. In the bathrooms there is a little vent. Take a small bowl and you can toke in the bathroom and blow directly into the vent. All of the times I have ridden the vent just sucked the smoke right in. Probably wouldn't be a good idea with joints or spliffs due to how smokey they are but a little bowl and small tokes worked well for me the times I've ridden amtrak. Of course the brownies would be a good idea too but I hate the way canna-food tastes.