GoPod Campers have their own business and other insurances. You as the hirer will need to have comprehensive insurance. Most comprehensive insurance has public liability and covers you for towing. Check your policy or give them a quick call. You will need this for your hire.
If for example you reverse into a car with the GoPod you will be responsible for the damage to the other car. You swap details and its handled like a normal claim. When you return we repair the GoPod with our insurances.
Roadside assist is available for most built-up areas but rural and regional centers may be more limited. If you are doing a big trip it might pay to include a caravan on your own roadside assist policy to get more coverage.