Perhaps, but I wouldn't be shocked if Eb found a way so Harry would get them anyway. There is Listens to Wind and there is Rashid, both might have access and get them to Harry.
I don't see the series changing locations, but I could see Harry inheriting Eb's place in the Ozarks. I could see Harry visiting that place in a single novel and perhaps using it as a safehouse for another character. Yes, Harry's new home is a fortress, but there might be a situation where the character Harry is working with can't be seen entering Harry's home.
Harry can use his amulet to use the ways to get there, probably in just a few minutes. His mother would have almost certainly travelled there.
As far the Eb's journals and all of the older ones go, I don't expect Harry will get the opportunity to read through all of them. However, Ebenezer's personal journal might be something Harry will get a chance to look through. One thing to keep in mind is that Jim won't want to give Harry too much information, because that equals too much power. Perhaps Eb's journals will be damaged before Harry get's the chance to read them and Harry will only be able to derive clues from them, rather than complete explanations. Also, I could see the earliest journal, the one that supposedly was written by the original Merlin to be mostly unreadable with only a few words or symbols clear enough to make out, but perhaps just enough for Harry to learn something important from. Most likely, only Bonea would be able to read them as they wouldn't be in modern English and it would be older than even Bob would have experience with.
