We used to try trick or treating when I was a kid (about 9 or 10 - this was in the mid 80s). There was a hell of a lot of walking for very little sweet stuff. Half the people just gave us a lecture on how this isn't America (a lecture we'd already heard from our parents before we left home) and even if they were charmed my our costumes and happy to participate, most people do not have stashes of lollies/sweets/candy at home. We were lucky to get a few chocolate biscuits. Still, it was good fun.