As they tip the scales to upper teen levels, then I personally expect them to effect the realms. Epically and close to godIike qualities as they close in on level 20 and beyond if epic levels are ever added in expansions/sequels.
Yup.
By now that's Granma Jaheira's territory - IMO she is like Ciri's grandmother in the Witcher books - she can raise a drawbridge with an angry twitch of her immaculately plucked eyebrows!
Minsc was dumb as rocks (and transformed into a rock?) hence his Realms affecting impact is nothing to speak about. Then again, Boo ...