I will be using a mix of Wilton and Satin Ice (that's what I do for my class cakes because I don't want to use up my Satin Ice just for class). It's actually warm in my kitchen so it shouldn't be a problem. I will be using Wilton's buttercream in a stiff consistency for the dam but may use the CK buttercream underneath my fondant. I notice by mixing my ingredients it's not as bad as it would be if I just used Wilton's alone. As I said, it's only a class cake but I still want it to taste good enough and hold up well under this extreme weather. I need to be done by 4:30 and that includes finishing up my roses (40+). Thanks Deah!