Don,t see why not. It only uses GPS to tell you where you are in relation to the known road network. The only caution required is if it tells you a minor road is available. A road that a camper can use may not be adequate for a 7.5 ton truck.
It will give no information as to where the roads are unsuitable or the location of low bridges and other obstacles. A 7.5 ton lorry is a lot higher and a bit wider than a camper.
