I've found that starting at wraiths can solve this. Smite big wraith, Despair the rest down, then go and despair the wolves. You'll get your "e" at wolves, then just wait a sec for your current red pot to get you to 80% and smite to be around 10-15 seconds left on CD. Then get that blue. This usually confuses the gankers...if you wait at wraiths until you see everyone in lane, even better.
I had a guy ask me after we won the other day "where did you start Amumu?" Their whole gank was a mess. This method is not as good as a nice leash with protection at blue, but if you don't have the team watching you...try it out.