I'm confused about your link, there are multiple rides. Maybe I've ridden too much in my lifetime to have the proper perspective, but I can't see how 30 miles a day requires any preparation whatsoever. 55 miles in a day is similarly fairly easy given the existence of even a single rest stop en route. If I'm riding thirty miles, I might not bother to take food. There is a 50 mile ride around here with a lot of climbing that requires some amount of food, 3 cliff bars for example. However, that's an exception, and even on that ride I don't stop. When I was a teenager, we called 60 mountainous miles a "one banana" ride. Of course, if you are doing a long distance ride, i.e. 100 miles minimum, more food is required starting earlier in the ride.