Carolyn wore slacks sometimes, didn't she? Especially when she was dating Buzz (and riding his hog).
carolyn's wearing of slacks here was specific to the buzz storyline(the better to ride that "hog" with).she never wore these before or after this.
however there was an episode in 1968 where she inexplicably shows up in a full riding habit complete with crop and jodhpurs!this was kind of funny because there was never any mention of stables being on the estate.she had a scene with tony peterson here so my guess was that this getup was supposed to make her look like a "spoiled rich girl".
there has been some debate over whether or not maggie's quilted maxi-skirt was not in fact extreme bell-bottom pants.i prefer to think of it as a skirt.
towards the end of the show's run they seem to get a bit more lenient in terms of woman wearing pants.megan todd wears them in a few episodes and i think both parallel time carolyn and angelique get a few fetching slacks ensembles.
but in general it was minidresses no matter how frigid it was supposed to be outside.conversely during episodes filmed during the summer everyone still wore heavy wool coats.