counterintuitive to buy a book for an area that is prone to change
Which is why it is great that Mike & Terri have the updates page on their website. Unfortunately, they get a lot of their info from readers but these days not a lot of us send in changes as we hear about them.
If you have any questions about what is in the book you can go on their website to see of any changes are mentioned. You can also ask here to see if anyone has specific info about specific areas.
If you follow this website you will find discussions about lots of places. One recent one comes to mind where there were a few posts mentioning the road conditions into a specific RV park. That is up the minute info you can't get anywhere but here. And another talks about a new bypass road that is not on maps yet.