I’ve always wanted to do a Romans in Britain scenario. In recent months, I’ve been picking up Romans on Ebay as I’ve found them, and soon will begin looking for Celts and Gauls.
This paper model of a section of Hadrian’s Wall might come in handy. In the scale it’s in, you’d need 79 for a Roman Mile. The model is in black and white, but a little work with watercolor and a fat brush would quickly solve that