looking to build a rig box in next few months. what is the best material to use? rubber or carpet or spray on bed liner? any ideas welcome. thanks

I’m from southeast Tn. Been around hounds my whole life. Had 3 or 4 myself years ago. Been out of it awhile. Ready to get back in though. I like plotts n walkers. But I’d run a Great Dane if it put a bear up a tree lol.