I think it is quite good.
I don't think it is the final word but it is far better, more comprehensive and authoritative, than many other sources. I think it stand up quite well as a sole source but really shines as a framework to hang other materials and applicable local details and knowledge on. An idea might be to print up the manual and put it in a loose-leaf notebook and then add pages that address your individual situation and add relevant techniques and options.
On the page for hurricanes they say:
Before a Hurricane
To prepare for a hurricane, you should take the following measures:
* Make plans to secure your property. Permanent storm shutters offer the best protection for windows. A second option is to board up windows with 5/8” marine plywood, cut to fit and ready to install. Tape does not prevent windows from breaking.
* Install straps or additional clips to securely fasten your roof to the frame structure. This will reduce roof damage.
* Be sure trees and shrubs around your home are well trimmed.
* Clear loose and clogged rain gutters and downspouts.
* Determine how and where to secure your boat.
* Consider building a safe room.
This looks like a place to insert a page that tells you where the storm shutters you pre-cut are stored, how they are identified so they get on the right windows, and how they are designed to be attached.
You might include a statement of which rooms in the house are deemed to be safest to hold up in if you can't flee. Also, if you know, which downspouts and drains are most prone to clogging/overflow, and any pre-established materials and methods you have for fastening down your boat, trash cans, picnic table.