A few days late, but just to add my opinion...
The most important thing, is to find a way to get your hands on the strongman implements. Logs, Stones, and Farmers are always incredibly popular. There's ways to simulate the events without the actual equipment, but it is always going to be second rate.
I would say that your training going to strongman isn't nearly as important as just beginning to train the events with proper equipment. My last contest, one of the guys towards the bottom half of the pack congratulated me for doing well. He told me he was a powerlifter, with a best total of 1700. I beat him by 6 places, and I might total 1100 on a good day.
I would certainly do better if I could add 100 pounds to each of my lifts, but the idea here isn't just to be strong, but to be good with the events. SM also incorporates elements of not just absolute strength, but strength endurance, anaerobic capacity, speed, and good kinesthetic awareness doesn't hurt either.