Yeah, it's super easy to take the Tozan Railway from Odawara to Gora. From Gora you immediately get on the Tozan Cable Car, which is literally right next to the Tozan Railway exit gate at Gora. Ride the Cable Car to the 4th stop and get out on the right side. HR Hakone is a ~5 minute slightly downhill walk from there. It's super easy, but if you have too many bags you can either call the hotel and they'll pick you up at Gora station, or a taxi is around 1200 yen.