Honestly, I love working with female crew members - helps to temper all the testosterone and provide a voice of reason. Some of the best techs I know are female.
To help get you "in there" try and carve yourself out a niche. You can either go for one of the big 4 (rigging, lighting, sound or vision), or even 'the person' to talk to about a particular problem that occurs often. (ie "Oh, you want to do XYZ, stopthekitty is the person to talk to about that.")
To become 'the person' to talk to about the big 4, there really needs to be a gap (so that you are not overshaddowed by someone more experianced), and you need to become really familiar with the goings on in that area. For example, if lighting, know that anything after point x on FOH 1 will not be able to reach the prompt side edges - even though it appears that it should, that patch point 42 is dead, and patch points 46 and 47 have 10A fuses instead of 20 like everything else. If you have DMX points scattered round the venue, know how they are patched, where the splitters are, what shares those points, do they need loop through connectors when not in use etc.
If it is sound, information like "3kHz is a killer frequency in this room", how everything patches (ie if you have stage to bio runs, breakout boxes arround the room etc)
And finally, don't go down on your knees for anyone remotely tied into your work. Even if it is love at first sight as that will only proove those people right (in their own minds).