Welcome to the forum!
Glad you are here!
Congratulations on the broody but she does present some decisions for you. There are going to be risks no matter what you do.
If you leave her exposed like that, she is at risk of a predator finding her and killing her and/or destroying the eggs. I grew up on a farm and we had several broodies hatch chicks in the barn or at odd places around and never lost one to a predator. We easily could have but we were lucky and never did. I cannot assess your predator risk or how important this specific hen or her possible chicks are to you. If you do not lock your hen house at night she's at as much risk in the hen house as she is out of it, so that's something else to consider.
If you try to move her, she might stop being broody. It is a real risk and I cannot tell you how she will react. If I were moving her, I would build a totally enclosed pen, probably in the hen house, where she has room for her nest, room to provide water and food, and enough room for her to come off the nest and go poo. I'd have it where she is locked in this little pen, can't get out and the others can't get in to her. I'd make her nest box in there pretty dark. That seems to calm them down. I'd fix it so I could lock her in the nest itself and not let her out to the food and water if I wanted to. Then, I'd move her and her eggs at night with as little light and commotion as possible. I'd leave her locked in the dark nest box until pretty late the next day, giving her time to eat and drink and maybe poo before she goes back to her nest for the night. If she goes back on the nest at night, she probably made the move OK. If she doesn't, you might try locking her in the nest for most of another day.
Another option is to build a predator-proof pen to fit over her in the barn, either big enough to put food and water in with her and leave her locked up or just make it so you can lock her in there at night when the predators are at their most dangerous. I would not try to build it around her since that could really confuse her and upset her, maybe enough to scare her off the nest. But if you could do something you could either set over her at night or maybe assemble around her nest in about 15 minutes while she is off on her daily constitutional, it should work well.
Different options. Any of them could work and any of them could fail. Good luck!
