RFE could be
Employ. verification
Birth Certificate
Pay slip
I94
H1B copies
But it's really hard to assume what it could be on your case...
If you have a valid H1B visa, you could take a risk now and travel...then you could take care your RFE while you're out of the country...
If you don't have a valid H1B, consult your Attorney and make sure he is aware of your travel, act upon his/her advice.