The coolest option I found was Jeremy Tully's DM screen on youtube -- so a huge thanks to him for that! If you're thinking about doing a screen of your own, check out his video.
In a nutshell, Jeremy uses binder clips to lock some three-ring binders together and tables in page protectors. I just used his idea with landscape-oriented binders and page protectors rather than normal ones. What I got looked like this:
I get to pick my art for the outside and change it any time I want.
I get the tables I want inside, and can even have extra pages of tables, flipping to what I need at a given moment.
It folds up pretty compactly for storage and transport.
I'm looking forward to trying it out in our game this evening.