I am making my first 3 tiered cake that I am delivering Friday afternoon (I have done several 2 tiered cakes). I am using the SPS system for this cake which is also a first. So it's a bc cream cake with fondant accents and a fondant American Flag draped from the top tier down to the bottom tier. I am thinking of frosting and stacking the cake tomorrow but I am not sure if I should wait and put the fondant decorations and flag on Friday morning or if I should go ahead and do it tomorrow. I was also thinking of putting the cake in the fridge to stiffen it up a bit before I transport it on Friday afternoon. It's about a 30 minute drive in the back of my suv which I am nervous about. Will the fondant decorations on the cake be ok if I put in the fridge for a few hours before I transport it? Will the fondant decoration sweat as they heat up from being cold?  

Any tips and help would be greatly appreciated!! Thanks!!

why not take some of the scraps and paint or color them the same as the flag and test this

tonight put the scraps & all in the fridge & take them out tomorrow & see what you have

I think as long as you are not in a very hot and humid environment (like Texas or Florida in July) putting the cake in the fridge with the fondant decorations on it shouldn't be a problem. The only time I've seen the fondant get really icky was when I had a fondant cake I made for my dad in the middle of summer that we kept taking in and out of the fridge. Over the course of a couple of days the fondant really started to droop off the cake but that was an extreme case.

I've also always been a little nervous about putting a completely fondant cake in the fridge, but because of that I have to steer customers away form any kind of perishable filling. I think I'm going to start being more adventurous and trying it out. I might try doing some tests like K8memphis suggested.

Good luck with the cake! 

I always put my bc frosted cakes with fondant accents in the frig.  So far, I have not had any issues.  

I would definitely refrigerate the cake overnight to firm it up for travel.  I delivered a fully stacked 3 tier wedding cake, using SPS (the best) and it made a 45 minute drive over what I swear were the worst roads in the area!  

Good luck!