I think this one deserves its own thread. I used to do it regularly when I was younger, especially going home to parents when at university. It once took me a day and a half to get to Dorset from South London and required me sleeping in a bus shelter in the middle of nowhere. One of the worst times was being dropped in a lay by on the M3 in the freezing cold and rain with lorries belting by at 70mph. Truly grim.