I think the OP was asking about fillings for her cake that will be stable outdoors in the heat to replace a cream cheese filling. Why not just use vanilla buttercream? Or your white chocolate ganache would be yummy, I am sure! My personal preference - the chocolate filling might be too different than what people are used to having in a RV cake and they may not like it. I'm not a fan. But that's just MHO.
8/9/13 at 4:17am