First I just want to thank this forum.  I have thrown out so many questions, and have learned so so much from everyone here that I can't thank you enough.  Thank you thank you!

Im making a cross cake, and the dimensions of the cake are quite awkward and large, so I had to make my own cake board out of cork board, cover it in fancy foil, etc.  The problem it has created is it's so big I can't get it into my fridge or even my oven (where I sometimes store my fondant covered cakes overnight)

It's spring/summer here in CT and I have seen ants on my floor.  I have traps all over the place, and it's not like over run or anything, but I worry about leaving my crumb coated cake out ( I have to leave for a few hours) and I worry about it being covered in fondant over night.  It's so huge that regular stuff won't cover it.  Any suggestions?

PS I'm crumb coating in ganache, my hope is that it hardens without being refridgerated before I cover it in fondant!

ACan you make a box with scraps of cardboard? Even make just te sides & put cling wrap on top?

Your ganache will firm up and dry without being in frig...I agree rig up something you can then apply some plastic wrap lightly on top. 

AThanks guys ! My cardboard is in the garage so it may not be totally clean.. But I'm pickin up what you're puttin down lol in going to try to do a makeshift cover...

Not knowing the dimensions, could you use one of those plastic storage containers.  I bought several, like from Walmart & Target.  I put my oversize cakes on the lid, lid upside down of course and use the container as the top.  It also kind of seals.  At least enough so that ants or other things don't get into the cake/food

If it is just  crumb coated or if there is an area on the top that will be covered by decorations, put some toothpicks or skewers in a few places on the top of the cake and cover with plastic wrap that will be supported off the cake like a tent. I have also left cakes on the counter and covered by putting   taller cans or water glasses around the perimeter and then  laying  plastic wrap over (supported by the cans or glasses).   Then tape the plastic wrap around the edges to the counter.  If your car is inside a relatively cool garage, put it in the trunk of your car.    If you have some of those refreezable blue ice things, (I have a bunch of the big square ones and use them a lot) lay them down, put a towel or a nonslip mat on top, and set your cake on top to keep chilled.