I am new to making cakes for people other than my own family and closest friends.
An acquaintance asked me to do one for a baby shower that I am not attending. Because of the timing, the cake will have to be completed the night before the shower.
I always use the Extra Special Buttercream recipe on the wilton site, with the whipping cream. It is what she is expecting. I know it has to be refrigerated. Also, I will be using a raspberry buttercream filling that has to be refrigerated, too, I guess
I am going to decorate it with MM fondant stripes and a bow and a banner that says "It's a boy!"
The cake will be iced white and w/ baby blue decorations.
Can I safely refrigerate it?
If not, does anyone know a comparable icing recipe that is as yummy?

Sure, you can refrigerate it. Standard procedure.

Thank you.
I have seen several posts that said not to refrigerate fondant, so I was not sure.
I am glad to know it will be OK.

I almost always use filings that require refrigeration, and prefer MMF to anything else outside. I have had no problems putting the finished cake in the fridge. I have heard to let it come out of the fridge and up to room temp in A/C if possible. I do usually use a crisco butter cream to do outside decorations on top of the MMF just in case, I think it is more stable and holds up better to temp changes.