We are a group of 4 travelling on the JR Rail Pass from Kanazawa to Naganoharakusatsuguchi and then looking to travel from Naganoharakusatsuguchi to Kusatsu Onsen on the JR Kanto Bus. How do I reserve four seats on the bus for a two way trip between Naganoharakusatsuguchi and Kusatsu Onsen using the JR Rail Pass? I also read on the website that each passenger can only carry a luggage weighing no more than10kg on the bus. As we are travelling all around Japan with our luggage, we will each be carrying a medium sized luggage weighing around 20kg. Is it possible to pay a surcharge for more luggage capacity for all 4 of us for the two trips to and from Kusatsu Onsen? We will be travelling from Naganoharakusatsuguchi to Tokyo after a one night stay at Kusatsu Onsen.
Thank you for your help.