NOT Spanish Trail.
Why not, Lauren? We liked it well enough last year. Sure appreciated the shade there - not extensive, but at least there was some. That said, for the OP, I'm not sure there are 50 amp hookups, and there are no cabins, which would be a detriment.
We were frankly not impressed with most of the CGs in that area; they all seemed to be sunbaked plains, which in a hot area is less than ideal, at least for us. If we had to pick one at which to stay, Dead Horse Point would be our first choice, assuming we could get one of the sites our TT would fit in.