Hello Motorcycle Mike, well here is more or less an official type of response.....take it for what it is...
hope this helps
as for the trailer, if it's out of sight it's more or less out of mind, and unless a neighbor complains, I think you will be good to go....that being my opinion only
Just go to the bylaw at http://www6.mississauga.ca/onlinemaps/planbldg/ZoneBylaw/DZBR1/Part 4 - General Provisions.pdf Section 4.1.11