I am going to the beach for the July 4 weekend and was thinking about making the infamous 'King Ranch Casserole', since there will be a big crowd. there. There is also no dishwasher and limited cooking prep area. I was planning on making it ahead of time (maybe Thurs morning?), and bringing it down to serve on Friday night dinner. Because of the small kitchen, I thought I might buy a disposable aluminum casserole pan to make it in; instead of my ceramic dish. But since the recipe contains tomatoes, is aluminum going to be OK? (I never use disposable cookware, so I'm confused). And will it be OK to prepare the recipe this far ahead of time without it turning to mush?