but do offer some needed shade in the summer.
Nice! Sounds like a good spot!
side of the coop and wetting the straw in the bottom of it
You might want to elevate the bottom a bit and use more of a deep litter setup. maybe just adding a 2x4 along the bottom to keep in the deep litter. Straw doesn't absorb moisture very well and tends to mold, so you might want to go with sandy, loose dirt (adding some clean wood ash for dust bath purposes - to help control parasites like lice and mites).