The more I look at it, the more DIY bike campers seem like an awesome idea. Why don't more cycle tourists do this?
Sure you have to go a little slower and haul more weight but the advantages of not fucking around with a tent and having your own, solid, private shelter that can even be parked in a walmart parking lot seem too good. Some bicycle tourers already haul a luggage trailer anyway.
https://www.youtube.com/watch?v=A9cx20BWZWI