Hi Debbie,
I would find it stressful, too. I can't wait for the last minute, I am prepared days ahead of time and then....... I wait! lol
I am up hrs ahead of time to get ready to go someplace. I've always been that way, whether for school or work or just life. My children are Last Minute Charlies' - drives me crazy.
Your best bet is to let DD & BF do what they promised. You take a laid back role. See how well they can work together and get everything in order. It will be a learning experience.
Hope it all works out nicely for ALL of you. Good Luck!!
God bless. Alice.