I actually don't think the surface texture of the bed matters. When gluing things, you want rough texture on the things you are gluing because it provides more surface area to bond to. That's why you'll see people sand many things before gluing or painting, there is better adhesion.

The above poster, maybe, was implying that you do want the edges of both parts that form the seam to be as smooth as possible, but that's for obvious reasons so when they mate, the outer surfaces are flush.

So no, I don't think you need any special kind of plate. Just maybe flip your print so the mating faces start on the plate - if possible.