I am making a grad cake this week and it needs to be enough for 50-60 people. I have already decided to make a hexagon two tier cake however I have no idea what size pans to use wilton says the 9inch and the 11 inch2 layers each would be enough but it just feels like it wouldn't be. Also I will have a grad cap on top that will be 6 inchs. Any input would that be enough or should I add layer to the bottom tier or make each layer the next size up?

It will be enough. Wilton charts suggest cutting 1x2x4", so as long as you follow the chart you'll have more than enough.

I can't find the serving amt for the 11" pan, but a 9 serves 26 and a 12 serves 40 so I'm assuming an 11 serves about 32-35?

If you want larger servings you can always go up a size, but I don't think you'll need to.