Yes, I agree with Naftush – schedule an hour and a half for the 160 bus ride. By the way, the bus trip itself is enjoyable for those who haven’t been down that way. You get to see the main road through the Gush and you also get a drive through Kiryat Arba, an impressive city that is about 5 mins from the Mearat Hamachpelah.
The organized tours with Simcha Hochbaum are also wonderful and safe.
Most importantly, go! Enjoy a fantastic time there! Besides getting the chance to visit & daven to Hashem at the site where our Avot & Imahot are buried, you can see the true roots of our nation there. Chevron is the city where David Hamelech began his reign over Israel. By the way, there are other famous Jewish personalities from Tanach buried there. The great thing is to see the Jewish people still there davening, learning, living — it’s not just a burial place but a place of Jewish life today!