I usually bake and freeze my cakes but I don't do the filling part until the day that I thaw the cakes. It may work just fine doing it ahead of time but I have never tried doing it that way. Sorry, I know that is not much help!!
Welcome to CC! Here is the one I use, it is very easy and tastes great. I usually use OJ in place of the liquour though ....http://www.cakecentral.com/cake_recipe-1952-3-Strawberry-Glaze-with-Grand-Marnier.htmlHope this helps!!
Have you checked out the articles on this website regarding the serving sizes:http://www.cakecentral.com/article14-Cake-Baking-Cutting--Serving-Guide---2-in-Deep-Pans.htmlThere are articles for the 2" and 3" pans. Hope this helps!