This is most likely an IBA Rally prepared motorcycle(The ride starts on July 1st). If so, he/she is getting ready to ride in a 13 day ~13,000 mile rally to collect as many points as possible. Most IBA rally riders will use multiple GPS devices for redundancy and will also keep alternate route options in each to give them choices based on weather, accidents, etc.
This person will likely catch short sleeps near the bike at rest stops, so there is little to no time for altering/entering GPS data on the fly.
This type of riding is no joke, I did almost 8,000 miles in 10 days earlier this year on my FZ6(which doesn't come close to the difficulty of 13k miles in 13 days) and it really took a toll on me physically. So the less they have to stop for fuel, GPS issues, etc., the more rest they can get when they stop for rest. In all, he/she will likely be on the bike quite a but more than off the bike for those 13 days, so comfort and safety are huge factors in all the stuff you see on the bike.