Correction: He did the massages for Cirque du Soleil. I had to look up the spelling, but did not look up the definition! :o
In the case of Wally Watts, apparently he did not have sufficient documentation of his trip to satisfy the Guinness folks. Though there was quite a bit, he wasn’t after the recognition as much as completing the trip. I don’t think Guinness had developed the above list at that time, but it sounds like a good one to apply when each person’s route is likely to be different.
Yup. Unless the trailer is attached in a rigid fashion, it’s still a unicycle; a vehicle that is balanced on, and driven by, a single wheel. The trailer would be an attachment. Of course many people would probably have a similar reaction, especially to a trailer with more than one wheel. Most people probably don’t realize that for a cycle trailer to work, it can’t also support the vehicle pulling it.
Any smart rider would do plenty of testing. But knowing how these things often turn out, the finished and complete equipment set is often only finished at the last minute, and seldom gets enough testing before the ride starts…
But once you’ve started, you have tons of time to get used to it; assuming it works. Wally Watts went through lots of modifications along his ride, including even having his wheel completely rebuilt at least once. And I imagine he wore out his solid rubber tire at least once.
I love the idea of a one-wheeled trailer for a unicycle. Ultimately you would have a support vehicle, but this is highly unlikely unless you are very well funded. If going for the “unicycle record” you should check with the IUF World Records Committee to see if they have any issues with a trailer. Their response would probably be “depends on the trailer”, to make sure it’s not a rigid attachment, which would turn your unicycle into a bike.
There are many reasons why this would be a good idea; nearly universal availability of tires, rims, tubes, spokes. The problem may be if you have hub issues. Got to send it to Switzerland. If you had a backup axle (either type) you could continue, but your repaired axle might have some adventures finding its way back to you…
BTW, at the end of a day you would of course be tired, but on those ultra-long trips, the riders get more and more used to the abuse after the first couple of weeks.