If it were me, I'd go in men's clothing or not at all. For you though, you probably need to decide which option you'd regret the most, which you'd be the most okay with.
1) Go in drag (girl's clothes)
2) Go andro
3) Go as yourself (men's clothes)
4) Don't go
When you read that list, really listen to how your inner voice responds to each option. Which option does it scream "hell no!" and which option is your conscience quietly (or maybe not so quietly) trying to "convince" you to pick?
Mentally walk through how you'd feel about the result of choosing option 1, right through to any follow up and lasting effects. Do the same for option 2, 3, 4. Compare how you'd feel a month later, with each of the choices having hypothetically been made.
For you, not going may be the worst option that would make you feel the most uncomfortable. Going in drag may be the worst. Going as yourself and having to face your family's responses may be unbearable. Consider each honestly and patiently, and soon you should be able to figure out which option is really the best for you.
Hope you find a satisfactory option, good luck.