Some people from our church are throwing a party for the kids they pick up weekly on the bus. I have planned on taking sheet cakes & now, of course, numerous things have come up. So, today is Tues & I'm wondering if I can thaw them tonight, ice them tomorrow & them sit out until Sat evening & be ok? I would get a box to place over them to keep dust off.

Personally, I would thaw Thursday, decorate Friday. I always get a bit nervous when they sit for more than a day because sometimes colors can change (darken) or wick into others. At the earliest, thaw Wednesday, decorate Thursday.

Depends on how cool you can keep them. Of course the cooler the better. Any chance of frig'ing them? If it is hot &/or humid where you are don't do it.
I onced worked at a very well liked bakery. I was amazed to see them completely decorate a wedding cake on Tues or Wed and let it sit in an unused room until Sat delivery!

Guess I'll thaw tomorrow & dec Thurs. I've just had stuff come up at the last minute---including my MIL coming for a few days. And I'm the kind that will stress out if I did it Fri b/c my Sat is packed w/ soccer games & festivals. Sometimes i wonder why I volunteer to do anything.

I know what you mean! I posted something similar. I work full-time and have a zillion commitments that are hard to let go of. I think as long as the cakes are kept cool or cold and covered you're ok. I would suggest keeping them in the fridge though.