Big Bend back country backpacking trip

Looking to go out on a 5 to 7 day backpacking trip to Big Bend in early November 2020. I've been backpacking for 15 plus years I love the US but never at big bend. Would like to go on a big loop if possible looking for any information I can get. Like where to park for multiple days best place to start my trip campsites you would recommend. In anything else that would be applicable.