Yep,
The simplest, easiest and most professional solution is a 5 ton grip truck and folks who know how to use everything inside.
The cheap “indy” solution is to rent a bunch of scaffolding then go buy a bunch of army surplus white silk parachutes to build what would essentially be a big-assed softbox around the band.
Then pray HEAVILY that the wind gods take pity on you.
Since you storyboard is heavy on macro shots – I’d suspect that smaller grip gear like Westcott 6×6 frames with silks, diffusion and black fabric would also come in pretty handy. (And be a lot easier for a small crew to control)
Finally, as someone who has shot in Arizona my entire career, estimate the amount of water you need to provide for all the people involved and then either triple or quadruple that amount along with plans to go get more if necessary. Plus slip at least one good pair of needle nosed pliers in your first aid kit and bring a lot of compressed clean air – desert dust is a subtle enemy.
Texas desert in August? You sure know how to have fun.