Cruise map completed today and tested it out, cant quite give as it was fair bit of stop, start, reversing and getting lost to set time but its about 2 hour mark. Unfortunately there is a few (counted 11 in the whole map) speed bumps - 3 of these being a bit on large side, but have mentioned these on the map.
I have incorporated a few stops for food or drinks as I am not sure what the weather would be like.
Update: Exact location of meet point in first post.