Congratulations on getting tickets. I may have an extra ticket, but won't know until the event gets closer. Every year that I have an extra ticket I do a Craigslist treasure hunt to give it away. I post a photo (for only a few minutes) of where Ill be at a specific time, and wait to see who shows up. Its in a crowded place, by a clock tower, and I provide no description of me. I say that the first person who asks me for the golden ticket after the clock strikes noon gets it. So far it's been a lot of fun.
The Sonders bike has a range (according to Court's review) that makes it pretty hard to be of much use at Burning man, unless you have multiple batteries or don't go anywhere. I suspect we will see a lot of them there, but none will be more than 7.5 miles from their starting point unless they are pushed back. The range might be far less in soft playa dust.
Its early, I haven't done the math, and I will probably remember the actual numbers later, but I believe one loop around most of the loops will be a challenge for the range of the Sonder's bike.
I plan to take a 45 pound full size folding mountain bike, 350 watt hub motor and two 10.2 amp batteries, (total range 60 miles, much more at a slow speed) however, I suspect my old Mongoose Ascent will be the bike of choice.
I plan to spray everything with as much protectant as I can find, but know that the bike I take will never again look as good as it does now. I plan to sell it after the event, and might even sell it at the event, quietly, of course, if someone wants it bad enough to ask.
I agree that ebikes are probably not worth it in that environment.