I want to get as much of my prep done on Wednesday as possible. I am roasting butternut squash (1 inch cubes tossed with spices and olive oil). Would it be okay if I peeled and cut it up the day before or will it dry out even in a tupperware? I have seen that you can boil the potatoes for mashed the day before. How do you store them? Any other thoughts or tips for preparing for the Big Day?