I like both ways. Most of the time I am alone baking, but when we have a bake off or cookie exchange where we all bake together at someone's house, it is the most hilarious thing to witness. Somehow we get it all done and everything is great, but the tears of laughter (and a few mimosas) , sharing past baking boo boo's is something to treasure..... and if one of us makes a mistake, there are other bakers there to help fix it or suggest a fix.
I never had an issue where someone took over, so I guess I am blessed with that..... our family bake offs are so much fun.... we have not had one in a few years due to scheduling and the family growing out of control, but hey, we had great fun