Impetus will allow armies to field a camp. They are deployed at the start if both players agree, so a sort of optional rule that can add taste to a game.
Of course camps/baggages will need to be defended. Also it will happen that your troops may waste time in looting the enemy's camp...

Well camps will measure a minimum perimetre of 40cm (around 16 inches) for 15mm and 72cm (around 30 inches) for 28mm. As a maximum you can multiply up to 3 those sizes.

This gives the opportunity to make some nice dioramas.
If you are considering to make such work why not post a picture here in the forum. Best camps could be published in the rule book.

An update. Baggage will be compulsory in Impetus.