Walls should be made out of the strongest material in my opinion. Because if something can break down a wall wall made out of our strongest material, NOTHING ELSE WILL STOP IT.
Weigh the benefits with the costs. How much of that brick wall could we have finished with our limited manpower and resources, how much more defensible would that actually have made our encampment, and how far back would using those bricks, which could be used for something else down the line put us?
First of all, 64 regular-sized little bricks? Anything with the intelligence of a house spider would just walk around them if we stacked them all in one place, and if we distributed them evenly around the perimeter we'd have something less effective than the dirt or logs. Thus,
for tonight, dirt and logs are the best possible fortification and the best use of our time. They go up easy, they come down easy, and they're
reusable. Stacking those bricks now would be like building investing in a missile silo in the 1850s.
Furthermore, what kind of enemies will we be facing that bricks will be more effective than an equally tall (actually taller) barrier of dirt and logs? Unless the GM throws some building-destroyers at us (which I admit is a legitimate concern) what is more important than the strength of the material is the defensive advantage, e.g. higher ground, distance, and impairment of the enemies' mobility.
So, in my opinion, until we have enough bricks for a truly formidable wall they're not going to be very useful.
Complete the dirt wall as much as our resources allow, get the woodcutters inside and get a few other villagers to help them shift the logs into an impromptu wall for the rest of the camp. then get any remaning chromes to start polishing their arms.
This one.