[@Arkitekt]

That would be amazing! Yes, yes and yes!

I was going to suggest Pyromancer Dungeon Painter as I've used it for my D&D sessions before, but it is very barebones for sure. I'd just be happy with a construction type of sketch on a paper too, just to get my bearings on what's what. I'm definitely a visual type so it helps to see what I'm imagining for sure. Another thing I've done before for my D&D, is just to build the set in Minecraft and take birdseye pictures of it. It's kind of crude but I found it fairly effective.