RE: BioLogic or Imperial products?
The truth is they both work. Sounds like you want a harvest plot, with it supplementing their natural forage base, as opposed to a destination plot with more emphasis on nutrient intake vs. hunting opportunities.
Harvet plots really have to be timed to the season to be effective. I'm a northern boy, so I can't put expertise on the TX climate and seasons. I can say the biologic works well here. I'm within 50 miles of biologics northern research facility. It is the dominant seed brand of use here. But really, both will work for what you need.
You just need todecide the desired seed before settling on a brand.