That seems unnecessarily complex. I mean, she's not even actually protecting Wanda that much.
Additionally, and more importantly, she tried to go and retrieve Wanda personally. She wouldn't have done that if she didn't think Gobwin Knob was doomed to fall.
(But something I don't get: How did she know Wanda was in Gobwin Knob and not fleeing with Stanley? The logical thing would be to assume that Stanley took Wanda with him, since she's so valuable as a caster.)