After diving into storage, I finally have some bases. All the camels are on 60 x 60mm and the dismounted Camel Corps are on 60 x 40mm, 3mm MDF.
Using wall board patch the ground is built up to the same height as the mini's stand.
Next the ground is stained with Vallejo Mahogany Sand 139. In the past I have use a brown. It caused the sand to be super dark. One or two tuffs added here or there. Tuffs are from Game Craft Miniatures.
My flocking material is now construction sand and this stuff.