
I just got these hex paper things for a different project and they would be cool to use for a Traveller campaign, especially where you explore uncharted space. It's "Hexagon Paper Piecing Paper for Quilting". (Amazon link). 200 for US$8.
The paper is glossy so the sharpie gel ball point I used here smears easily (takes a minute to dry I guess). And the paper is thin, but might be easy to glue onto some cardboard or cardstock.
But I could see a campaign where you build these up over time placing them onto something else - corkboard or taping or glueing down or even putting them on something magnetic).
(I don't now how to make the picture appear in the post heading)