I'm DMing ROTF for players that have a very deep knowledge of the lore of the Forgotten Realms, it doesn't bother me at all, but I would like at least to be prepared enough anyway to properly address the campaign theme. I've read "The Crystal Shard", and keep digging into wiki and other sources of lore, but there is still a lot of things that I don't know for sure.
Worth noting that we known at least "when" it happens, as the book says:
This adventure is assumed to take place in the winter of 1489 DR or later. The exact date is not important. The happenings in this book occur more than a century after the events chronicled in R.A. Salvatore’s novel The Crystal Shard, which introduced the drow hero Drizzt Do’Urden to the hardy folk of Icewind Dale.
Massive spoiler for the Forgotten Realms books or some other campaign books.
About Bruenor, Catti-Brie & Regis:
Bruenor is dead, but does anyone knows he is reincarnated as Reginald Roundshield? Does he himself? Same for Catti-brie and Regis?
From what I understand Drizzt is trapped in another plan? There is nothing about him left in Icewind Dale, except maybe legends from old nannies?
About the Dwarf, and more specifically the Battlehammer clan?
Is Connerad Brawnanvil still The leader of the Battlehammer clan? It's unclear from Rise of Tiamat.
Overall do you have any advice on how to proceed with lore accuracy in the campaign, and some sources of lore I could read in preparation