1) Probably yes.
2) No-the only default exception, to my knowledge, to Thread Necromancy exists in the Homebrew forum. The creator of a piece of brew may re-open the thread if they wish past the 45 day limits.
3) Yes.
Also, something the mods have said about Campaign Journals is that this is a discussion forum-if your journal generates discussion, great! It's good to go.
If it doesn't generate discussion, and is just the journaler posting without any discussion being had, it's not appropriate for this forum, and better off as a blog or something.
I am not a mod, this is just going off what I know from what I've seen the mods say. Best of luck with your gaming!