Make sure you have a plan for the volume of wort you are producing. Using a 10-12 gallon carboy is best to keep the wort together as a whole...but make sure you have some help as the end product will be VERY heavy for a one man lift. I usually keep my 12 gallon carboy on a dolly, so once complete I can roll it away.
If you split the batch into two five/six gallon buckets or carboys, I recommend using a 'T' connector to get even collection of the wort from beginning of collection to end in both buckets/carboys.