Anna and Robbins,
I've done a couple. Get them to sign a disclaimer on service. You can be responsible to get it to the table, but from then on its in someone elses hands. One we did the photographer decided to have an arguement with his assistant, arrange the back lighting, change cameras and film, etc. all the while the cake getting softer and softer.
I've always put them together just as alaska, totally wrapped in genoise or cake. I've always had the ice cream maker make it up in 1/2 gallon blocks like the commercial. I usually sell buttercream icing, if you use a dence cake or pound cake it is more forgiving while icing. Build the whole cake, ice it, wrap in plastic to prevent sweating, and freeze. We separate each layer with plates and request to disassemble the layers and serve. It is as messy as cheesecake if not worse.
ps I don't soften the icecream, I build it with the blocks.It never seems to get rock hard after softening, put the posts in w/hot steel. pm if you get stuck or have more ?'s.
Never! Live To Work!:::::::Work To Live!::Life Is To Short!!