Ajust wondering what you guys do if you do a cake a few days before pickup ? do you freeze them? Put them in the fridge ? What do you store them in? how long can you leave them out at room temp for ?

Hi....Wow....Loaded question. If the cake has perishable ingredients, such as the filling, that require refrigeration, then they cannot be left out at all.   That being said,  I bake my cakes as much as a week in advance and freeze them.  I remove them from the freezer the day before they are due and torte and fill.  When they are in the freezer, I store them in tightly wrapped Saran wrap, double wrapped.

HTH.

Ayea I know it's a lot to ask but I was always worried about freezing a cake and loosing freshness. If it's just a buttercream do you still let it sit out ? I used to put them in the fridge onced iced but they get hard & a wee bit dryer I find

Well..In my experience, I find  that the buttercream seals in the moisture in the cake.  I keep my buttercream frosted cake refrigerated until right before I box it up and deliver it.  Alot of time the cake will only feel dry because the buttercream has "crusted".   If you are concerned about moisture loss, some bakers brush their cakes with a flavored sugar syrup before frosting to seal in moisture.