Brown Recluse info anyone ???

This was my first arachnid pet, I didn't know what they looked like and my cousin had a huge supply living in the country here in white co. , southern Illinois, so he caught one to show me, been hooked since. Had them wc from nearly world record 3in leg span to nickel size, even one that was clear when caught, guessing freshly molted but awsome looking. The problem is that the only info I can find is on bites or how to get rid of them. I've kept them for around 8 years and learned alot, and still learning !!! I can keep one alive for over a year but I know they can live alot longer in good conditions. Any help would be greatly appreciated since my most recent spiders died a few days ago. Size of tank, heat, humidity, about any info would help.

The only ones I've ever seen were under a very large rock in west Texas . . . so the only advice I can suggest is keeping it on the warm / dry side, but with a cool / damp spot to hide.