I have a baby shower cake due this wednesday I am doing all the gumpaste fondant details tomorrow to let them dry out,,,I am Baking my Wasc Cake tuesday and covering it in BC and Fondant and filling it with strawberry BC...I am then covering it in saran wrap! Can I keep it on the counter covered in the saran for a few days with out spoiling??? as I would really like to make and assemble the cake Mon or tues in case of any issues...so I would have time to re make??? Or can I put the fondant and saran wrap covered tiers in the fridge??? I here fondant will harden and or crack in the fridge??? is this even true??? Pleassssssssssssssssssseeee help me with this cake dilema!!!

Once you have iced then covered in fondant, you dont have to cover. The fondant will seal in the moistness. When I have 3 or 4 cakes due on a Saturday, they are frosted and covered in fondant on Thursday, then I just have to add the gumpaste and other decorations. I do though sometimes, put a large storage tub over to keep dust (or anything else in the air if the windows are open) off of the cakes.

They will be fine as long as your fillings don't require refrigeration.
You can put fondant in the fridge, I do it for all my cakes (I like to transport chilled cakes) and other then the condensation (which evaporates) I've never had a problem.