Last time I found a super tiny little bit of plains that I could totally engulf I just didn't want to rehash the same seed.

I don't plan on going until I'm ready. I can deal with most things in the plains minus Berserkers without too much issue. Before Bonemass (but swamp Geared) I can deal with up to three Fuling at once in any combo and up to 4 sketters. (As long as I identify stared mobs quickly) so I'm not too worried... I took my first wolves down before I had bronze (I was mining Copper... didn't know about them. I wear the cheese the cheese does not wear me.

My last Castle was 40x20 I think at the inner side of the earth works.

The largest Ring Fort I made thus far has been 4 beams 16 sides... Which gives me a decent internal starting size. But I think I want to go 8 Beams with should make it 4 times bigger internally. Which is about a 36x36 square plus the outer defences so likely about 40x40. It isn't a small space. I don't come across many strategically useful places on the Meadows that will let me build that big almost everything is always sloping up from the beach fairly quickly.

Sounds like I'm going to be going for a boat trip at some point. (I'm long planning... the current seed I put finding the right land as my priority not realize that location I spent hours building in was as far from Black forest as I could have gotten on the map as far as I can see. I ended up building a small outpost and a cart path that is a 3 minute run. So I have time...