I'll try AI for journey planning. I tend to use AA route planner as a start and build in comfort/fuel stops around it and use past knowledge for the route as well.
Scotland trips are over 500 miles home to hotel on regular routes and mrs sospan now wants an overnight stop in the border-ish area so Carlisle/Gretna/Dumfries used on recent trips. The 250 mile rule of thumb for fuel is easy to manage and on a new route petrol stations can be found using online maps to adjust the planned route. They can be put into the satnav as waypoints.
