I've got a dry erase battlemat from Crystal Caste, which so far as I know is standard DMing equipment.
But I find erasing and redrawing to "scroll" the map to me a messy and tedious process that slows down the action.
If there were a way to do it, I'd like to draw the maps on something cheap and possibly disposal, like cling wrap or something. Just need a clear plastic to see the squares beneath, be able to write on it with a dry erase pen, and have it not get smudged if it's stored for a while rolled up.
Anything like that exist? Is there a better approach to predrawing that I'm not thinking of?