It's been a long time since I played IWD (and it turns out so long that I barely remember anything), but having played a lot of BG I think I've at least some idea of what I'm going for.
I've tried not to go too spoilery but I've been told it's good to have a bard, and a halfling or gnome and a paladin.
I've gone for
Human paladin undead hunter
Halfling cleric (yes the -1 wisdom is not optimal)
Elf Fighter/thief - I'm not keen on dual and multi classing, but a pure thief is a waste I think.
I did try hard difficulty but I've realised with 50% extra damage it's going to be a bit too dependent on luck for having to reload saves etc.
I don't expect I'll want to replay more than once to do the harder modes etc. I know multi and dual classing is optimal from a player power perspective, but I do prefer not to.
So does this party seem reasonable, and will it allow me to see most of the game etc?