question

Drakelets certainly can be much bolder than the ducklets.  When I used to sit out at dusk & feed cucumbers to my ducklings it was always the drakelets that would come up and literally snatch them from our hands and could catch them in midair.  I'd call my Mom and she'd come out and sit with me and she always hated when she dropped her knife because she was afraid to reach down and pick it up afraid that they'd attack her! lol 

At this point if your birds are all around the same age there might not be very many fights going on or it might be a case where everyone is pretty much on even territory.  As they mature, and if they ever get to the point where they're in too small of an area you will see increasing behavior.  A lot of times the first sign can be picking; when they start pulling blood feathers.  This can be related to too small quarters or it can be a sign of inadequate nutrition, protein, in my experience.  If they're able to maintain their personal space in the shelter you have provided then you probably won't have any or many fights occur until breeding season or the birds reach sexual maturity, whichever occurs first.  Once the testosterone begins to flow I don't think you'll ever be able to get away from fighting unless you only have a single drake!