Marching camps for small detachments

[fsultana]

One thought: if each infantryman carried 2 of the pilum muralis-type wooden stakes to form the protection to the earth bank, the
Simplistically, if a century of 80 men has 5 "non-pila-porters" (assuming centurion, optio, tessesarius, standard-bearer and musician are spared), then such a century would have75 x 2 pila = 150, enough to form 50 "caltrops". The lateral length of each is 0.85m, so this is enough to form a square (the 4-sided shape with the highest area for a given perimeter) of 10.6 x 10.6m (i.e. 50 caltrops x 0.85m x 1/4 for the four sides), an area of 112 square metres, or 1.4 square metres per person, i.e. not enough.

Without any of the math presented above (or anywhere near the knowledge), I had a "feeling" that a small marching camp just would not look right and would be too small to be effective. That's what prompted my original question. Throw in any animals and the space becomes even more severe.