I am an IFB, but my family and I attend a Reformed Baptist Church that is not IFB.
My wife and young daughter wear pants when working on the farm, generally on our property, or in my daughters case, when playing outside. If we're working in the garden, pasture, butchering chickens, hogs, turkeys etc then my wife and daughter wear pants that day.
If we go out in public I have my wife wear a dress if possible, and if not possible (below freezing temps) then non-form fitting pants. If she has to wear pants we make sure her loose fitting shirt covers her rear. Some females in our Church family wear a cloth on their head in addition.
We are really kicking into gear with my daughter on dresses this year as she hits 2 yo so that she gets used to dresses and skirts. She will largely be wearing plain dress akin to what my Mennonite Sisters wear.
In our Reformed Church women do wear pants, but the Pastors have the expectation that they are to be modest and not form fitting. Still, however, some women choose to play the harlot in this camp.