Cake Dilemma

So, I've been thinking about this cake I have to make for the Anniversary. I have the design in my head and have been working on the wine bottles. But, I have no idea how I'm actually going to construct it. This is a pretty big undertaking for me. I've never made a cake like this before. It is supposed to be a picnic basket with wine bottles, grapes, and cheese in it. It's uncomfortable to me that I can see this beautiful image in my head, but absolutely can't figure out a way to construct it. I know I should probably attempt to make one prior to the actual day, as a practice cake. It would definitely be worth the experience to do it. I also don't want the cake to look terrible for the party. My plan as of yet is to bake large rectangular cakes and then stack them to make the basket. Then I was going to make a couple more layers and cut out most of the center, leaving an inch of cake all around the side as support. I would then roll out some fondant and use that as a "table cloth" and drape that in the basket, then pile in the wine bottles, grapes and cheese. I'm not sure if the rim of cake would be enough support though. Should I use a layer of styrofoam instead? I could make a styrofoam tray with a raised edge and then decorate it as I planned. Then, when it comes time to cut the cake, they could simply lift the top off and they would be left with a large rectangular cake. I'm really not sure which is the best way to go. Well, I'll just have to keep thinking on it. I have two more weeks before it is due.