At the beginning of May I will be travelling from Hampshire to Glencoe and then on to do some of the NC500 route. I will need to stop overnight en-route from Hampshire to Glencoe. I have a small motorhome and it will be just me and my dog. I do not really want to go too far off route so somewhere close to the M6 around or a bit past the Carlisle area. I do not need facilities, just somewhere to walk the dog. Can I stop overnight at a motorway service station and if so do you need to book or just stop and pay or can anyone suggest a place to stop.