travelling while you're on OPT is perfectly fine. I'm doing my OPT and recently went home for a month and came back without any problems. And guess what, my POE was the one everyone's scared of - Chicago. नबिराउनु नडराउनु!
if you don't have fake degrees/trainings/resumes like some people do (just check a recent thread about a student on OPT getting deported), there's nothing to worry about.