No problem. All we do is start a three player public game and password it so that it's just us two split-screen players that can get on. Odd that that works, but we can't play together on a 2 player, split screen, local-only map.
We usually play local-only split screen, but online so we can unlock the clothing as we go. That's what's not working for us just now. Much appreciated with your efforts at this time of year.