PokeStop

The current gym meta is pretty tough. The best counters against snorlax are fighting types (hard to get high cps where I live though! Don't know about Australia) & wigglytuff. I've also had success with vaporeon. Regardless you must dodge. Especially if the defending snorlax has hyperbeam. That charge attack is too strong & if you get hit, you'll be flattened. I know dodging is difficult on some people's phones but your gym battling goes much better if you can dodge well.