I like your plan of moving her to an isolated area so she can hatch without the coop traffic. That always works best for me. I find integration issues are much easier to solve than kicked out fertile eggs or broken eggs or abandoned nests because my banty has been pushed off by larger and more dominant hens.
My banty gets no respect from my main LF flock as she is the only banty, so I too separate her when she broods. I then used to reintegrate her (I don't now simply because I'm always raising the next generation to keep my layers turned over, so she is always brooding for me...she gets done with one set to start the next so she gets permanent residence in my broody hutch now.)
However, when I did re-integrate her, she was surrounded by her chicks (I waited until they were about 6 to 8 weeks of age? Beyond tiny baby so they couldn't escape out from under my fence). She was a demon possessed taking on any flock member, even the top hen, if they even looked so much as sideways at her babies. She kept all the hens at bay. Momma and chicks made a tight little band of feathers until the babies were nearly adult size (about 16 weeks?) and momma went broody again (she broods about every 3 to 4 months).
So I think re-integration will go well if you integrate them when momma is still acting like a mom but babies aren't so small that they can expire quickly if they get stranded from mom, especially in the cold weather. Even older works well as the mom and babies will make a tight subflock that will stick together and fend off any aggressive attacks. Younger works only if momma is confident enough to fend off overly assertive hens and cannot be chased away from her babies such that they get stranded.
It can take anywhere from a couple of weeks to a couple of months, due to general flock chemistry and individual birds, until you see complete integration, but that is the way of the pecking order.
My experiences.
Lady of McCamley
