I contacted Recreation.gov about their web site being inaccurate. If you look at most BLM sites listed there, clicking on the "View Official Website" at the top of the page either returns "page not found" on the BLM website, or now I'm noticing that they take you to a "buy a map" page.
The response from Recreation.gov... Thanks for letting us know. I agree with the OP, the original information pages were much more useful.
If you are determined, you can probably find most of the orignial information you seek via
https://archive.org/web/Unless you know the original URL, you will need to search the various BLM field office sites historic URLs to get the URLs you want. Won't be easy, but I think could be done.