Well, the last major relocation that I know of was the one south of Kincora. Before that, it was the boardwalk in Jersey.
So, the data book should not have changed significantly. I would not hesitate to use an out of date data book.
Wingfoot’s handbook and the ALDHA companion does change quite a bit from year to year. In fact, when I hiked though in 2001 and 2002, I discovered numerous changes in the data, so I marked up the pages accordingly and sent it back to Wingfoot. Hopefully, the 2002 and 2003 editions had fewer mistakes in it. But, I guess that Moose didn’t notice all the errors.
I think that if you have an out of date handbook or companion, then you need to ask others about the services that are available in the next town.
Peaks