Freight trains are fun. Jump a unit. Third or forth one back is better. Just don't touch anything. Some Quebecois boarded my unit one time somewhere in Northern Ontario, and i'm not sure what they pushed or pulled because I was sleeping (you sleep a lot of units, something to do with the motion it has a narcotic effect), but whatever they did, the effect was thoroughly negative, the unit went dead quiet in the middle of nowhere wilderness. The big engineer (they're all big, its the motion and the effect on their glands) that came bursting thru the narrow unit door grabbing the immensely huge steel wrench weighing about 15 lbs was extremely pissed, ready to kill actually. Watch out for it.
Lucky there was an empty coal car a few back...lol.. now that is a very low class way to travel.
Pack lots of survival type food, some sterno, water and a good bowie knife or two. You'll be fine. Make sure you deboard before the big cities ESPECIALLY Winterpeg, real nasty CP police there, no forgiveness whatsoever, Regina is more relaxed. Scenery is spectacular, take a wide angle lens...and whatever you do, never ever crawl under the cars of a stopped train. When the units move, they jerk the line forward..u can be cut in half in a second. Roll forward in a summersault when you exit.. 10 to 15 clicks is safe provided there are banks..toss the napsack first, then go for it. (Never at a crossing.)
You'll make the Calgary yard in three days, and the cost is zero plus the clothes you wear. Burn them.