Big Bend Conservancy
2019 BigBendChat Calendar on sale now!
Wow. That's a big ask and may take some time to put together. In the meantime, there is a post from user Trtlrock from 2015 detailing a pretty epic cross-park fandango that should capture some of the high points you are looking for. I will note that he spent months in planning and weeks caching, so don't expect an off-the-shelf option here.
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