I enlarged the inner fenced in area, and put in a behemoth gate so that we could keep all of the dinos inside, and it will give us a little more room. I just used wood for that, but planning to use all stone walls for the outer fence. I'm probably going to to only start with a single wall high just to lay outer the ring, but we will probably want to go 4 walls up or higher at some point. Was going to use metal bases, but I guess we could do stone bases as well. Was just thinking metal because the dinos can't damage it, and it is only 5 ingots per base.