Here is another mobile robot that can carry loads for people autonomously. The Robotnik RB-CAR has a range of 70km. It has 680kg towing capacity. It can also carry up to 2 people. The robot has a max speed of 35 km/h and can overcome inclines up to 30%.
The RB-CAR is based on ROS. It comes with WiFi. It has plenty of connection options. The above video shows it in action.