Tomorrow I'm driving back home to London from Durrham with my 5 year old DS2. He is prone to not very reliable regarding the toilet and will wait until he is bursting to go. In the car on a motorway I'm thinking it my be wise to put a nappy on him not to replace the toilet but just to take the panic out of getting to a service station in time. He is still in them at night (otherwise it wouldn't be an option) and on the journey up he was wearing one as it was late in the evening. However tomorrow I'm leaving mid day so its a bit different. I would make sure that he was fine with wearing it but I'm still not sure whether it is the right thing to do. Any thoughts?