I don't see any pictures in that classification that remotely match (other than color), so I might should just leave this one where it is for now

1) This needs to be moved to the family Erythraeidae. This is clearly a mite, and not a spider... note the fused prosoma and opsithosoma, funky eye arrangment, and general appearance. From there, the easiest way to be convinced of Erythraeidae is to check the images in the guide. Trombidioids are generally furrier, have stalked eyes, characteristic leg arrangement, and have a "lumpy" appearance. Erythraeids are super diverse, but you can develop a gestalt by identifying a ton of specimens.

2) I would love to get specimens of this beast, so if you see any more, please contact me. They can be commonly collected around the same time of year in the same habitats. That would also give us an excuse to ID it to genus! Happy hunting!

I can sympathize with your skepticism. Erythraeidae is an incredibly fascinating and morphologically diverse group, but has scattered literature and very very few researchers. While you're welcome to argue the genus, there is no doubt on the family. I could give you a positive ID on the genus if I had a slide-mounted specimen, but from this photo, I can only give my educated guess that it's Erythraeus, because I'm finding Arkansas Erythraeus that look superficially similar. If I start getting specimens from TX, or find superficial ways to differentiate Erythraeus from other long legged erythraeids that look like this (for example, Paraphanolophus, which can be differentiated by the number of serrated spine-like setae on the palp-tibia), I'll let you know.