Sorry for taking so long to get back to you! I've been extremely busy.
Also, sorry if I don't give you the answers you're looking for, I'm not 100% sure I understand what you're asking.
For the bug you ran into with the war - do you mean all the Estates and villages ended up destroyed after you'd gone through their "saved" events, or a specific village and/or Estate? Each one behaves a little differently, and some events involve you destroying the location yourself depending on other actions you took earlier in the game, so what happens where could be on purpose depending on specific events. I can't help you or identify any bugs based on what I can figure out from your post.
For the trophies - 28 is the only one you can lock yourself out of among those you mentioned. The others you can get at any time.
28 is the smoking pipe, which you get after a secret scene with Willow during the cult meetings. It is possible to miss and be locked out of, but you have more opportunities to get it than there are unique bits of information to find during the meetings.
30 is the pickaxe, which you should get automatically after a specific challenge fight. If you haven't found the area where that is, there's a Folk nomad camp that has a secret exit only while you're in the mountains.
31 is the dog collar, which is a reward for passing Anne's quiz in Uncle Gil's Estate.
34 is the golden blade, which is another cult-related thing, but doesn't have anything to do with the meetings.
I'm glad you like the game!