On randonneuring rides, we normally stop every 30 miles or so and snack as required- a couple of candy bars or the equivalent in corn dogs, sandwiches or whatever floats your boat will work.
If you're trying to do this thing in 5 hours, then yes, a couple of 5 minute breaks in there. If you're aiming for, say, 8 hours, then by golly, stop for 20 minutes 2 or 3 times or however much you like, no hurry can make it a lot more fun.
If you need an excuse to stop, take a camera and take pictures.
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"be careful this rando stuff is addictive and dan's the 'pusher'."