I am making a wedding cake for the middle of June that needs to stay cold.. it is a red velvet/cream cheese icing filled topsy turvy. I am going to assemble onsite, but other than turning the AC on in my car for 30 minutes prior to leaving, does anyone have any good ideas on how to transport the cake in pieces and keep it cold all the way to the event?

other than the ac do you think that you can rent a refrigerated van???

I keep all my cakes in the frig before delivery. Then, crank up the A/C during the trip. I know others say not to refrigerate fondant coverd cakes, but some do anyway, especially with a perishable filling. I'm not a fondant person but from what I've read from other people, they say you can still do it. I've seen Buddy on Cake Boss do it all the time.