Well I am only in charge of stuffing, (which we agreed to and will share) and cranberry sauce (which I make because I want to eat it even though no one else will). Since we are going to be going to two locations back to back I will be making the cranberry sauce ahead of time, likely on Tuesday while working from home. That way I can taste and tests until it is spiced to my taste since no one else will really eat it.
As far as stuffing / dressing goes I will likely make it ahead of time as well. This will be done likely on Wednesday and will heat it up Thursday morning to crisp up the top. For the first location I will do it at home and the second I will do it on the shared oven. Its not ideal to crisp up the tops in the shared oven but we are going to go there early to escape the first Thanksgiving early.
We did the whole deal at our place a few years ago and it was chaos. We made the bread, the stuffing and all sides ahead of time. We planned to have the turkey ready to rest when people were suppose to arrive. That way the oven was open and I could focus on the gravy. The gravy ended up great even though I didn't have a gravy shaker which was apparently the greatest sin. Don't worry we got multiple of them for Christmas that year