Heya adventurer's! So I'm creating a dungeon run by gnome Artificers in a foundry/mine. It's my first actual big dungeon and have some concerns. We do all of our combat on a dry erase matt with our minis and I only have two Matt's. Usually I can get away using just the two Matt's but how might I manage more than that? Hoping to have some pretty large sized rooms for big encounters and possibly a second level. 

My question mainly is do people just erase the board once done with those rooms? What if there is to be back tracking? Larger scale stuff intimidates me quite a bit but seems so fun. 

Thanks for any help!!! 

Easiest way is for you to have the dungeon on paper, and then draw on the dry erase as you go. Someone in the player group needs to draw what they are seeing as it is discovered. That way, they have a reference on where they've been and can backtrack. Then you are free to erase as needed. If, when they backtrack enemies have appeared in an already explored area it can be quickly re-drawn just for the combat.

You could scan the mat into the computer or take a picture of it. Tracing the map prior to erasing the mat would also be an option, and could be done as someone is drawing a larger section on the 2nd mat.

I use a combination of a dry erase mat and cardboard tiles. If the party wants an overall map, then its up to one of them to make one.

In soem situations, like Dungeon of the Mad Mage, I will give the party a map of the level they are currently on blotting out where they have not yet been (using Paint). I tend to blot out most of the map so they can't tell what is where.