Edgar Allan Poe said:
Why, it looks really good! Rivendell camp is just that in the mod, a military camp. Palisades is probably the best option.
I'm nitpicking, but I feel like elves are almost incapable of creating things that are purely utilitarian without an element of beauty to them (similarly to how orcs create many clever things, but nothing of beauty.
I think elvish walls, even palisades, would hold a hint of the elvish hands that built them. More elegant lines, maybe some delicate carving (bored elves waiting for their troop to move out might well take to carving the wall posts just for the fun of it).
This is ENTIRELY up for debate and disagreement, but I might actually be willing to model something if Merlkir (or, >sigh< Mr. Milker) wanted to draw up some ideas and if anyone else cares about it.