Those that don't train for touring and just "go"...
How do you build up on the go?
Do you have a mileage range that you try to maintain?
How do you plan stops and what contingency plans might you have in mind if you cant make your stops?
Do you have a "stopping point" with how your legs, joints, body, what ever, feel that you know when you're there its a mandatory shut-down?
Do you put mileage on then lay low for a day or two to recuperate or keep the mileage manageable as per some of the above answers that lets you keep moving every day?