Yeah! I see No Reason At All that a teenage girl might feel uncomfortable going to a coding camp where she'd likely be outnumbered 10:1 by teenage boys!
Right. Wouldn't want to make anyone uncomfortable. That would be terrible.
I absolutely agree: women should be allowed to form their own spaces to learn programming if they'd like, especially if it makes them more comfortable, and it means they won't have to put up with harassment from assholes!