wow.. I was just reading about bavarian cream today and just set out the ingrediants to make some for the first time to fill one of my cakes!
I make pastry cream all the time and needed something that isnt so gooey 
To my knowledge, I dont think you can freeze anything with custard ( eggs/ dairy) fillings. I could be wrong tho!
-- Jane
Oh... That wasn't really the answer I wanted. 
But then, I guess I always prefer the truth.
I didn't make my creme. I bought a tube of it at the cake supply store. I used it in a cake for a baby shower. I don't know if I didn't put enough in or what, but people didn't really comment on it.
I still have a lot left and was thinking of putting it in some cupcakes I'm making for a friend's wedding reception.
I know store bought baverian cream can be refrigerated because it says on the website where I buy it that "filled cakes can be refrigerated or frozen" I'm not sure about a kind you add water to though. This kind is ready made.
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