Not just me- many people here are... in fact, I'm far from the top of the knowledge tree.
Yes, I freeze them before icing also. I package the same way with one exception. I wrap each cake layer in plastic wrap. Place as many will fit into a cake box and wrap on the trash bag.
When I want a layer or two, I remove it from the bag and box, leaving it in the saran wrap and allow it to thaw.
Make a layer or two and try it out just for kicks. Your freezer may produce different results. I've kept mine like this up to 2 months.
I also take left over cake, cut it into serving sizes and freeze using the method of freezing decorated cakes. then when a family member wants a slice of cake, I just grab one out of the freezer. I allow it to thaw under a paper towel for about an hour. I've even placed it into the microwave for a few seconds to hurry it along. It's not same day fresh- but I guess comparable to next day fresh. Just fine for a quick fix for the kids or hubby.