Others might advise on the camper trailer, I’ve never had one. I like the look of the swing arm suspension though. Reason I’m posting is only to suggest that you talk to as many folk with traveling experience as you can before rushing into any particular set up. How you plan to travel has an enormous bearing on what sort of ‘accommodation’ will best suit. If planning to stop for reasonably long periods between moves then a camper trailer might suit, but if it were me I would quicly tire of having to put the thing up & take it down all the time. Long trips are quite different to short trips where things that are bearable over a few weeks become rather less so over many months or years.
That Canter seems well priced for such low kms. Woud make a good single person tourer. Rear duals can be converted to ’super singles’.