About to cook a 5gal batch of a roggenbier base to split 5 ways and experiment with flavorings. Should I do my primary in one big bucket and divide for secondary, or divide into 1gal buckets for primary?
How are you going to experiment with flavorings? If it was me I would split them into 5 1-gallon buckets, use two or maybe three different yeast strains, and then experiment with any other additions.
Dry-hopping and macerated lemon zest (too lazy to make limoncello this year) to come up with a good lemony flavor. I like the looks of my base recipe (yeast, bittering hops, etc) , and splitting after primary would reduce my variables: it's all the same until I throw in the additions as long as I don't screw up the actual split.