I'm delivering my very first wedding cake (all buttercream with fresh flowers) this friday. 14/12/10/8/6 yikes!

I'm writing out my timeline and hoping someone more seasoned can comment on it? I'm worried about my buttercream getting too 'crusty' for reasonable stacking. Here's what I'm thinking

Wed: Take all cakes out of freezer to thaw, make all my buttercream. Fill, spackle, and crumbcoat.

Thurs: Ice all cakes, stack and decorate bottom 3 tiers

Fri: Deliver (not till 2pm, wedding not till 4pm), stack and decorate top 2 tiers, and place flowers.

Thoughts???? Should I ice my top 2 tiers Friday morning instead of Thursday? I wanted to leave Friday morning available to potential disasters. Should I place the flowers at the venue or at home?? Any help is appreciated. TIA

What kind of buttercream do you use? SMBC, no problem, not sure about PS buttercream, I don't really use it.

All I can offer on this one is to definitely place the flowers at the venue. Flowers are good at covering up minor boo-boos, which can happen while stacking.
I assume that you're transporting the bottom 3 tiers already assembled? If so, be sure to have extra BC with you in the event that something happens. At my last wedding, a rowdy kid decided that he wanted to "try" the icing and gouged out a piece of fondant with his finger. You never know what will happen once you get there and you want to be prepared for anything.

I will be using sugarshacks bc recipe.