Splitting a batch

[Millarkey]

I am planning to brew my favorite Irish blonde next week and I'd like to split the batch into two 2.5 gallon batches. If I were fermenting the whole batch in one 5 gallon carboy I'd be using 1 Wyeast smack pack.
I've never split a batch before and not sure what to do when pitching the yeast. Do I split the batch and just use half the smack pack in each or pitch the yeast in the whole batch and then split it up?

 

[deepcdan99]

You could do either. Pitching first may be a way to evenly destribute the yeast rather than trying to eyeball from a smack pack.